Being pursued by a debt collection firm for a debt that was cleared before they decided to contact me. No amounts of letters or communication appear to put them off, even quoting they are in breach of this guideline or that law etc. The originator, T-Mobile seem to be pretty nonchalant, and assure me they have told the debt firm, several times to forget it. So my friend who's brother is a solicitor, seems to think I should write to them, and say an administration charge has been placed for dealing with them, at say a nominal £45, and any further correspondance will be handled by a solicitor as a greater sum. I am self employed and own a registered business, so is this legal ? Anyone know ? Apologies if it is also a daft question, but this debt firm are really annoying me.