Cheers for the feedback, I think this blatant attempt at swindling is beyond the level that even a clown could manage. With regards to my letter, I do believe that it won't be in their archives, and there would be no proof of sending as I used a post box, and didn't get it signed for on collection. They could easily have just binned the letter for all I know, is there any chance they'll investigate and pursue their claims?
I guess another fear is, could keep pushing up the value I owe them up to a suitable amount in which they may take to court? Of course, my assumption is t