Dispicable service from Cell C Mall of the North

In January this year, I took out 2 data contracts with Cell C. Within a period of 4/5 days, the ****les were returned and exchanged for 2 higher data contracts. The assistant accepted the change, but only processed everything on 19th February 2019, so effectively I was over charged incorrectly for 4 contracts instead of 2. At the beginning of March I received a call to collect a repaired ****le. When I went to the store at Mall of the North, the manager, Koena informed me that my query was going to be looked into that week and I will receive my funds back. After several attempts, this issue has not been resolved and I will debited for 3 ****les this month. This is totally ridiculous to say the least. Each week I call I am told that the area manager will attend to it and get back to me. If I don't make contact with the store, nothing is done. I am beyond fed up. The ****les need to be taken back by Cell C and I will pay for the data used to date, but nothing else as I have truly been inconvenienced financially as well as time wise.