Yes, I am sorry to say to you that they can do this - they held out an offer to you which you did not accept. They are now going to pursue you for the full sum.(posted 8121 days ago)But you did write them a letter back accepting their proposal and asking if it could be paid by instalments didn't you, and it got lost in the post. Phone the solicitors up and try to reach an agreement with them before it gets to court. Ask to speak to somebody "without prejudice" and then if agreement is formed, it can go "on record" and be binding.