Cell C double debited my account and refuses to refund!

In October 2021 Cell C took a double payment for my contract taken with them, unfortunately this amount could not be carried over as credit as it was the last debit order towards that contract. I have called customer care countless of times, had numerous “Cases” opened with them for them to refund my money as R2300 is not a small amount for me to just forget about! I have sent proof of payments multiple times to each person i spoke to and Till this date i have no feedback, the cases i opened get closed within a day by customer care saying that the case has been resolved! What the hell do they understand by the word resolved if my money has still not been refunded!!! I then went into the Gateway Cell C branch, spoke to the manager Kenneth and received no help as all i got told was i need to wait 1 month for a refund, 3 months later im still waiting. I went into the same branch again and spoke to an assistant manager Ashley and all i get told each time i call now or go in is that their systems are down and they can’t help me, i wonder how their business is running if their network has been down for almost 5-6 months! I have tried every possible method i was asked to do as per their requirements and still received no help !