MTN contract canceled

Since on January I don't used mtn numbers because I blocked the Sim card. But mtn take de money every month. I was not have problems because I know I was still on contract. But on 16 June 2021 my contract was finished but mtn continued take de money on my account 3 months back I tried to call de mtn service told me Dat is off line. Dis month call mtn service day person was help me told me Dat after 23 hours contract will be canceled. Today mtn take my money again on de bank account. I tired with dis people. PLEASE HELP ME HELLO PETER I NEED MY MONEY BACK IS R308.50 PLEASE. THANK