Cell C cancelation - disgrace

Good Day

I cancelled my contract with Cell C in Dec'21. Made my last payment end of Jan. To my suprise I received a message this morning saying I'm handed over to VVM for R160!! I phoned your customer care ***, where I asked your customer care agent what the reason for this is and he answered me "there was no reason to hand you over I don't understand". He gave me this email address and told me that he can not assist as he does not understand why this happened. I am furious, I have been with Cell C for atleast 3 years, if not longer, never was there once a debit order that could not go off. Why did you not debit my account with the R160, there was more than sufficient funds for it! What is your procedure? Why was I not informed regarding this? When I cancelled my contract I asked your employee more than once is there no other fee for cancelling?? The answer was NO. I want those recordings. Your feedback will be appreciated.

Denise