Debit my account but cancelled router

I had a month to month contract 100gb router which I cancelled 25-01-2025 I went to MTN store in Westgate to give back the router & cancel. I had issues with cancellations when calling retentions but eventually consultant at Westgate store sent an email to channelqueries on 07-02-2025 with the form that proves that I returned router-Ref IRMS***.I then called retentions 12-02-2025 to check if its cancelled which the consultant confirmed that its deactivated. I still told the consultant that MTN debited me 04-02-2025 but I don't have a router anymore he said its last debit. But to my surprise this morning I got an sms MTN debited R295 again 04-03-2025 which I called retentions the consultant told me that the cancellation has been declined due to things that the store need to sent so they need to log another call for me so that it can be cancelled. This is pathetic service the process is draining and useless cause its just a month to month which takes MTN forever to cancel and on top of that they don't even call nor email the store to confirm that they haven't sent sufficient info to cancel. I am very upset as you keep debiting but I have no router since 25-01-2025 as you can see your records I keep buying data.I need someone to call me back urgently and sort this out. I want it cancelled and refunded. I really don't understand why is it so hard just to cancel. I am ****ed off & don't expect me to go to the store again.