MTN's Bad Customer Service

So I was due for an upgrade in April 2021. In March a lady called me to get the ball rolling. I am assuming that at the start of May I will be on my new contract but that hasn't happened. Instead, I get calls every week asking me if I want to upgrade and this is shocking cause I already spoke to someone to upgrade my contract and when I asked about it they just tell me that it's not been processed and it's waiting for approval. So I ask them why they are calling me if that's the case. I get no answer. After getting tired of the calls I sent MTN an email asking them to cancel my contract cause it seemed that nothing is happening as per the reference numbers *** [#***] but still no response.

This month they send me a bill telling me that I am on a month to month. Something I didn't agree on with a bigger bill. I refuse to pay and now I am being told that I will be blocked from making calls but why when all this is not my fault.

I was very honest about my requirements and now this? If they block me then I will move to another service provider