MTN inefficiency

I called MTN in September (using a colleagues cell) to cancel a contract ***)that essentially expired in April 20. I was asked to call back in 10 days or so to check it had been actioned. I did. It had not been cancelled. Called back in Otober and spoke to Thando Ref *** who was on the line with me for ages but then confirmed it was now done. At the beginning of November - still not discontinued. MTN this is gross in efficiency, and you need to please sort it and refund me R180.00 Thank you