Hi Fed Up,(posted 7439 days ago)I think you need to follow the Do's & Dont's on this site. Unfortunately as you made an offer you have admitted to the debt. What you have to remember is the Solicitors make NO decisions, these are done by the Halifax which is then advised via their Solicitors.
If I were you I would start putting the lender to strict proof, ask to see evidence of the amount they are requesting from you, documentation, etc. etc. Even though you have re-started the Limitation Clock I would still go all out to make them prove the debt to you, asking for all the receipts, etc.
Good luck.