Just an update.. Final Payment was due 19.11.2019. Its now 18 days since then and no letters or mails. Not sure if they have given up or are spending time thinking on other ways to threaten... Thanks for following this and I hope it helps anyone else facing the same issues..
It appears they are offering a further £2060
why not ring and ask if this is true?
if so state that as soon as you have the money you will file a notice of discontinuance with relation to your claim to the court.