if you have to talk to them, DENY everything, think of any paper trails you may have left along the way and remove them. if denying doesnt work tell them this is libellous, and is becoming harassment, and you'll countersue them for wrongful prosecution if they wanna push it further.
makes me nervous too, i have watch on the way via EMS, and the tracking isnt even in the system as of 4 business days.
goodluck, im sure youre just a small fish to them and theyre trying to make an example of you. move your reps somewhere else other than your legal dwellings...you never know.