A&L need advice....

[Raffles1]

I need some advice, after taking advice from the courts I accepted and cashed a cheque as part payment of my claim and wrote to A&L informing them of my intention.
In the same letter I offered to settle for a lesser amount. 3 weeks later I receive a letter from solicitors offering a little less than I agreed to settle for.
I phone and write to accept this with 4 week timescale for chq to be in my hands.
I telephoned solicitors to find out what was happening after 2 weeks to be told A&L had dealt with the cheque and it would be sent directly to solicitor and then on to me.
A few days later I receive a letter saying Ive already received this cheque for second offer.
I write and email to say I havent.
Then Im told I have already had settlement as in first cheque.
I phoned and am now told that the first cheque was full and final settlement but they will go back to A&L to see if they want to withdraw from offer.
I am also told I should have told solicitor I had already received first cheque, surely that is up to A&L to do that as they are their client and not me.
Timescale:
Initial offer of settlement : 23rd May
Accepted as part settlement and
offered to settle for lesser amount: 1st June
Received letter from solicitor offering lesser amount : 21st June
Accepted via telephone and letter 28 days timescale : 22nd June
Letter saying have already received 2nd offer: 6th July
email to solicitor to say this is incorrect : 8th July
no reply
email (including original email) asking to be looked into :13th July
Letter from solicitors stating original
chq full and final settlement :16th July
Phoned to query today and am awaiting response.
I am still waiting for a court date but am quite willing to take this through to its conclusion.
Your views would be appreciated.