Hi, I intend to make 2 claims for returning my penalty charges one with my current bank NatWest and one with my previous bank Nationwide.
Whilst the NatWest claim should be straight forward as it is in use the Nationwide account has been closed for a year or so.
The Nationwide account was closed after I missed a DD to a company who then emailed me to say the DD had been missed. I then paid them over the phone using my Debit Card.
At the time I had just moved and had not updated my Nationwide account details as they refused to give me a debit card even after I had stayed with them 6 months (which they requested) with my wages going into the account each month, the wages being far above the required amount to be acceptable for the card.
So anyway

because of this I didn't receive any of the statements telling me the DD had allowed me to go overdrawn, which resulted in me being charged over £400 for missing a £12.99 DD and then having my account closed (after months of paying the debt off, which I struggled with at first as the fines each month were higher than I could afford to pay off! so had to have the fines frozen however it was too late)
So really this story is pretty long now..
But what I want to know is how do I find out my account number for that account? I have moved 3 times since the address they have on account, I can't think of any way to prove I lived at any of the addresses I have on their record (other than perhaps the original address on the account) and I no longer have any statements.
Lastly, is it reasonable to expect these charges back? I haven't checked my credit history yet but I am pretty sure the whole Nationwide ordeal has destroyed my credit history as I can't get ANYTHING on credit anymore and £400+ charges for missing one DD seems a tad excessive.