Poor customer service

In November 2022 I forgot to renew my contract and Mtn automatically placed me on Month on Month contract. In January the I called in to cancel my contract and I was told it will take 30 days. To my surprise nothing was recorded on the system and tidate mtn is still running a debit for Zab amount of R699. I called in February 2023 and I was told the contract will be closed on the 17th of February. Can someone from Enterprise business help me with this account closer. No one knows the process.