MTN Billing issue

I have been dealing with a few consultants form MTN since May 2018. I initially requested and itemised billing report for a single month (REF ********** 3). What I got was itemised billing added onto my monthly billing instead because the person that assisted (let’s leave her name out of this for now) did not understand what was required. I then logged a query asking for the service to be terminated and my money to be refunded for the months I was charged. After some back and forth as well as refusal to refund me, and me having to send e-mail proof I eventually got them to arrange the refund on 10 October. My email response was” Please allow for 5 days for your query to be attended to” This was almost 1 month ago. I still have not received a reply. I have also received SMS’s stating that my query has been resolved, which has not happened though. I think because of people like Prudence Ntuli and Nonkululeko Nkosi that I dealt with in May and who have resulted in me having to pay MTN more that I should for the past 5 or 6 months, I might likely move to another service provider. I have lost track of all the refence numbers, but here are some of them: ********** 3 ********** 0 1- ********** 0556 1- ********** 4249 1- ********** 4406