Disgusted , extremely disgusted....... my problem started when

Disgusted , extremely disgusted....... my problem started when sales lady called me in November. She sold me a router and told me that if I'm not happy I can return the router within 7 days and I won't be charged. The router never work, never connected. I returned the router to Eastgate Mall as per instructions. Ref number: IRMS 62311 and I called the call center and provided them with the ref number and told them to cancel the contract. I called on the 11th November 2021. The contract was not cancelled and I have been debited for the router. I called again in December on the 30th December 2021 and spoke to Sibo and she told me she will follow up and call me back and she never did. I called again. I called again on the 3rd January 2022 the contract is still not cancelled. and on the 6 Jan 2022 and the 10th Jan 2022 and spoke to some guy Enhle and he also told me they will call the contract and credit my account. The Fu**en contract is still active and MTN is debiting for something I don't have. I reserved the payment because you are really messing my financial status. And now my MTN phones are blocked and I can make payment because of this router contract. Can someone fix this mess now