Dont trust MTN to cancel your contract

From 29 June 2022 I have been trying to cancel my data contract. I called the Retentions Department in July, a month before the contract expired and cancelled. I stopped receiving statements and the sim went offline. 19th October I found out that I am being debited almost double the contract value. I immediately called 135 and they were off no help and put the phone down on me so I tweeted MTN and requested a copy of the call from July were I cancelled the contract. I was given a ref number and told 72 hours for the query to be resolved. 72 hours have come and gone and I have once again been debited R999 without even a statement being sent. Now that is almost R2500 taken off my account for a contract I cancelled. And still no response from MTN for that call recording or action.