Cell C Charging their customers after the contracts have been paid up and cancelled. Overcharging and cheating customers who have not upgraded.

I would like to complain about the terrible service that we have received from Cell C. My father has been a client of Cell C for over a decade. During covid he was unable to make his cell phone and wifi contract payments. I took over his paymentsnd we went into the branch at carnival mall to cancel his debit order so I can make the direct EFT payment for both his contracts. We gave the consultant all the documents she requested and got this reference number ***. After a few months of me making the payments to Cell C, my fathers cell phone was blocked when he went to the branch with all the proof of payments, he was told that he needed to pay in the amount of R62.89. He made the payment as they were unable to tell him why he was being charged in the first place. My father is old and did not inform me what had happened. His phone was unblocked and he went on his way. a few months later he was told to do the same thing and this happened 3 times. The contracts finished in June 2022 and he told me that he did not want to carry on with the contracts and so we canceled them. He still has the numbers and we opted for pre-paid. We were then notified this year that we have been handed over because we still owed Cell C money. I contacted Cell C and they sent me an email stating that Cell C in fact owes us money and that this should be refunded. They told me that we do not owe them anything. Well of course we didn't owe them anything at that time but in August 2021 our statement shows an amount of R132.89 as a payment but this amount is a DR on the account and not a CR then in September 2021 we have a failed debit order penalty fee of R70 but like i said we canceled their authority to take any funds from my father's account. These charges are also being processed on this account after we canceled the contracts. Now my father is being contacted a year later because Cell C has handed him over. When we call the branch they are unable to help us and when we contact CSS Credit solutions they are unable to assist us and told us that they will escalate the issue to Cell C. I can't believe what pathetic service we have gotten from Cell C and that they are charging us for something that the branch ( the sales staff, the face of Cell C ) apparently sorted out for us. can some1 any1 from Cell C contact us to sort this issue out as my entire family has contracts with this service provider and we are all going to change to MTN and Vodacom soon because of the terrible service we have gotten from Cell C, especially the way they treat their loyal customers. The account number is ***. This honestly looks like Cell C is charging customers extra fees after they have decided not to upgrade with them.