DISGRACEFUL CUSTOMER SERVICE FROM CELL C AND I WANT ANSWERS!

My review is about the terrible customer service I have received from CELL C. I have recently cancelled 2 contracts with them at the end of June and all my benefits were taken at the beginning of July 2022. I have even received a zero balance statement but recently I have started being harrassed by HP Attorneys regarding my Cell C account. I called Cell C this morning and was put through the contracts department who noticed on the system that I owe R170.00 and they might have handed me over for that amount .That was so shocking and really very disappointing as I have been a loyal CELL C customer for over 10 to 15 years and to be subjected to such poor service and treatment is disgraceful and I clearly have no value as a loyal customer.I was asked to call the collections department where I was told that I should not be charged this amount because both my contracts have been successfully cancelled and that it is wrong for me to be charged for it. I have went from customer care, contracts department, collections department ,etc and nobody can assist or give me proper answers as to how this can be resolved because I am very frustrated and this is affecting my credit profile and not to mention that I am being subjected to many calls and smses for money that I do not owe as I have always paid by debit order and even have a zero balance letter from Cell C stating that I owe them nothing . So where are they getting this R170 from ,I want answers!!!!!