MTN *****ing customers money after contract is cancelled and paid up

Very disappointed with MTN would not recommend this network, for a contract option, they just take your money even after you have paid up your contract and you said you want to cancel your contract. I got a contract for an Iphone for a two year contract from August 2020 which ended July 2022, however they charged me again this month, after I had to spend hours trying to get hold of a customer care person to cancel my contract cause at the MTN store they informed me that they cannot cancel and that I have to phone to cancel and if I don't that they will continue to debit me, so finally I get hold of someone and cancel the contract and they say that I will just be charged a small fee for the few days of use and it will a prepaid number, but what do you know on the 25th they debit me again for the initial contract amount and more. When I email them with the queries, they tell me that my contract ends end of July 2024 and that if I cancel now I will have to pay a cancellation fee. Like MTN just *****s peoples money, just want my money back and I never want to get a contract with them or use their network.