Wrong deduction from bank account

I had a bad experience with MTN the past 2 months. My contract expired 2 months ago and I cancelled it, knowing that the amount will be deducted if I don't cancel it after the expire date.

I got a reference nr on that date. The next month the same amount went off my account. I phoned MTN again on 17/06/2024. They convinced me to take another contract for R99.

On 1 July, they deducted the previous amount of R771 again. This morning I phoned and spoke to 6 different agents. The 4th one put me on hold for so long that I went back to the main menu. I took the same route and I ended up with nr 5..he listened and he said he don't know why they deducted that. Then he talked about a cancellation fee and a new contract fee. I told him that no one told me about the cancellation fee. He put me through to someone else without answering me. The next one just said hello and dropped the call.

This is very frustrating. The call to 40 min and 13 seconds and I only am more frustrated.

I want my money back that they deducted wrongly.