Dissatisfied with MTN

I HAVE BEEN GOING IN CIRCLES WITH MTN REGARDING THIS. END OF 2021 I CANCELLED MY CONTRACT AS IT ENDED, I DID IT TELEPHONICALLY AND I WAS TOLD I WILL RECEIVE AN EMAAIL CONFIRMATION WHICH I NEVER DID. THE CONTRACT ENDED BUT THEY STIL DEBITING MY ACCOUNT. NOW I JUST RECEIVED AND SMS THAT MY DEBIT ORDER IS CHANGING FROM A CERTAIN AMOUNT AND ITS NOW MORE,I DONT KNOW DEBIT FOR WHAT AS THAT CONTRACT SHOULD BE CANCELLED. LAST YEAR I REQUESTED A STATEMENT OF MY OUTSTANDING BALANCE AND TILL TODAY I NEVER RECEIVED, INSTEAD ONE OF YOUR CONSULTANTS ASKED FOR MY DETAILS. I DOESNT MAKE SENSE WHY AS MY DETAILS REFLECT ON YOUR SYSTEM. WHEN ONE VISITS A STORE,YOU ARE TOLD TO CALL THE CUSTOMER SERVICE AS THEY CANT ASSIST I NEED URGENT RESPONSE ON THIS OR I AM ESCALATING THIS MATTER FURTHER.