Hi, this is my first post ....i hope ive put it in the right place

!!
Okay, i have issues with HSBC.
I needed a little help in December 2006 which HSBC refused. By a little help I just mean a slight increase in my overdraft as money I had been expecting did not surface plunging my three children (including one newborn) into a potential xmas hell. I only wanted a temporary increase and my problems would have been cleared up by the latest end of January 2007.
The best they could offer was to revoke my cheque book, guarantee card and credit card - putting everything into one 'affordable' monthly payment etc, etc, etc - in other words one of their 'Managed Loans'.
I refused this without even hearing anything about it as at the time this was just a temporary cash flow problem and thought their suggestion of doing this over such a small thing was ludicrous.
However, in their wisdom HSBC decided they were going to bounce everything they could, apply charges to my account - sometimes twice for things re-presented etc leaving my children and I with nothing to live on.
After doing a bit of research I swiftly cancelled all direct debits from my account and made alternative arrangements by way of opening a new account elsewhere in order that we were not left penniless and unable to live.
I then started an uphill struggle with HSBC which has been ongoing for 6+ months now.
I firstly contacted HSBC and asked them politely that in view of the circumstances if they could stop all the charges (for being over my overdraft, interest charges etc) in order that I may bring my account back into credit (which would have taken me at maximum 2 months).
They took weeks to reply to my letters, by which time further charges had been applied. I had a few months of this until I sent them a letter requesting they repay all my charges using a letter template i had found on a helpful website.
Eventually all charges were refunded to the account but this left me still slightly over the overdraft and I was terrified that they would just keep putting the charges on.
In amongst the letters I feolt I had no alternative but to ask for details on a Managed Loan as I felt this was the only way out - they took months to reply to my requests but eventually sent me the requested details.
To my horror I saw that the rate of interest they were charging was 13%!!! This would mean that I would be paying the Managed Loan off until 2019!!!
I wrote back and told them in no uncertain terms that I would not be paying that rate of interest and suggested they review it and make me a better offer.
I was then contacted again and offered a loan of £2370 - this amount includes my overdraft, personal loan and credit card - with an interest rate of 6.7%.
The letter set out what I would be paying etc and the repayments were reduced to approximately £25 a month for me as I knew i could afford that without much of a problem.
However, in principal I accepted this by way of a letter and asked for the Managed Loans to be sent to me. On receipt of the Managed Loan forms the interest rate stated 13%. There were two accompanying letters, one stating they were sorry I was unable to keep up to my loan payments of £36 a month and one stating that in view of the fact that I was unable to keep up to these payments an following our telehphone conversations (of which there have been none because I refuse to speak to call centre staff in wherever they are, that repeat the same lines again and again and have no concept of the situation) - and say that in view of the circumstances they will lower the interest rate to 6.7% and my monthly repayments to just less than £25.
I have kept sending the Managed Loan forms back (approximately three times now) circling the interest rate of 13% and requesting a Managed Loan agreement stating the agreed interest rate of 6.7% and each time they have just sent exactly the same Managed Loan forms changing the date alone and the same two letters again only changing the dates.
It has been so infuriating.
I finally received a letter yesterday stating "Taking into account your current circumstances and as a concession to you and without formally varying the terms of your loan agreement, HSBC Bank are prepared to agree a lower interest rate. Therefore, your loan agreement forms will quote an interest rate of 7% (what she actually meant there I think was 7% above the Bank of England base rate) and a concession letter will confirm any reduced interest rate agreed".
I am still not happy - am I being stupid?
I do not think that a concession letter stating that "in view of my circumstances" they will charge an interest rate of 6.7%, holds much weight and they could revoke it at any time. By signing an agreement I am locking myself into it until 2019!!!! (My 7 month old son will have grown up and may have left home by then!!!)
And also its not like the interest rate is fixed - they say that they usually charge is 7% above the Bank of England base rate which is currently 5.5%, giving an APR of 13.3%.
Any suggestions would be gratefully received as I have had enough. I have three young children age 6, 4 and 7 months, the eldest I home educate and I am a lone parent and to be frank I havent time to play ping pong by way of letter with HSBC who it seems to me are in are a law unto themselves.
Thanks for taking the time to read my post.