Account handed over INCORRECTLY for COLLECTION

Account handed over after being paid in full!! now im told i must pay legal fees - i will NOT do that. Account was paid in full for 2 months before handed over for collection to ITC solutions - who have never yet called me for outstanding balance that i dont even owe - WAKE UP Avon CREDIT CONTROL DEPARTMENT - this is unacceptable and an utter disappointment to your REPS. Been trying for 5 days to RESOLVE this after speaking to many consultants and a Team Leader - im still no where. UTTERLY DISGRUNTLED