MTN SA & BOZA NETWORK ****

I signed a contract with MTN SA in 2019 and from September 2020 I started to receive calls from Boza Network who assured me that their with MTN SA and since my contract is coming to end they (Boza and MTN) would increase my minutes and data which will be coming at no extra charge/fee. I repeatedly asked that this doesn't come with additional costs, they assured me that this was not a new contract or an extension. In January I noticed that I was billed far more than what I have been paying since I took out the contract and when I called MTN I was told that since my contract ends in May and my last payment will be mid month this was because of the pro-rata for the remainder of May 2021. This didn't make sense but I accepted the explanation but was shocked that in February 2021 this (overbilling) was continuing, I was told that these guys started to bill my second sim card I got when I took out the contract which was zero rated. Since Feb I've been told of numerous escalations of this matter where at some point a query was closed off without resolving the matter, up to this day MTN has failed to resolve the issue.