MTN - cancellation

In June 2022 I took out package with a wireless router and didnt work for us so cancelled it within the period allowed for a refund. Took the router back to nearest branch and after numerous calls to the call centre nothing was done. For months MTN deducted money from my account. 2 December I eventually managed to get hold of a manager at call centre named Vasigan Naidoo who communicated with me via e mail and thought now this will get resolved. 14 December I advised this manager again that nothing was happening as now MTN took off another R2499 from my account at the end of November. He then confirmed cancellation was in process and I would get the refunds for payments already made and the R2499 just deducted off my account and that he was sorry for all the delays.I followed up 20 Dec, 30 Dec and when I spone to call centre again they said he was on leave although each e mail was copied to the call centre. 16 Jan 2023 Vasigan contacts me again and asks me to send proof of my bank account which I did the same day. Again I followed up on the 23rd of January and 31st of January 2023 and STILL HAVE HAD NO RESPONSE FROM MTN. It is clear they just dont have customer care in mind even though they are called "Customer Care Team Manager" Just cant seem to get this out of them and just clueless who else to report this situation to.