BILLING AND CONTRACT

I HAVE A PROBLEM WITH MTN MONTH TO MONTH CONTRACT , WHEN YOU APPLY EVERYTHING IS SMOOTH BUT WHEN U CANCEL THE CONTRACT YOU WILL BE SENT FROM PILLAR TO POST , I CANCELLED A CONTRACT ON THE 1ST OF APRIL 2025 TILL TODATE NO CANCELATION . WHEN I CALL NO ONE SEEM TO KNOW WHAT IS HAPPENING . EVERY WEEK I CALL MTN TO NO STRAIGHT ANSWER INSTEAD IM TOLD TO SPEAK TO MENDO , STILL THEY CANT GIVE AN ANSWER TO WHY THEY CANT CANCELL THE CONTRACT . I WAS REQUESTED TO SEND THEIR DEVICE , WICH I DID . NOW I AM BILLED ON SOMETHING I DONT USE OR HAVE