Ridiculous service from MTN

My experience with MTN has been absolutely shocking and I can't believe the level of incompetence. My story goes like this: in the month of July 2024 documents were submitted from an employee at MTN Port Shepstone after visiting their store where I was advised that they would submit the email to the relevant department in order to cancel my business contract. I then received a response to advise that my request has been received and they are working on it. Low and behold imagine my surprise when I was debited double the amount that I usually paid during the month of August 2024. When I went in to enquire about this I was advised that my contract was indeed not canceled but was migrated to another plan. At this point I was livid as I wanted my contract canceled as per the email sent in the first place. I visited the MTN store in Port Shepstone 12 times but everytime it's one excuse after another. MTN proceeded to debit me furthermore during the month of September and October 2024. I was then told that after 21 days they will process a refund for only two months. I visited the store after the 21 days and was advised that that the *********** person who was assigned to do the refund has attached a note to the system stating that there's not enough information provided to process a refund. Long story short my contract was canceled in July 2024 MTN further debited me for 4 months after the cancelation and now state there's not enough information provided that justifies a refund. I shudder to think of the incompetence that MTN employs these days. There is never a manager available at the store to assist as well. I challenge MTN to respond to my complaint and would not recommend them to anyone. If it was possible I would give them a negative rating.