POOOOR SERVICE.

I had a contract with MTN/ Rewardsco, and it was due for an upgrade I received a call to upgrade of which I did . I was told I will receive 30G day and 30G night, but then when it was loaded, I did not receive that 30G day and 30G night. I was way lower that that, then I called and cancelled the contract I was told that if I want to cancel I can before the 7 days is over. I took the contract on the 14/06/2023 and I called to cancelled on the 15/06/2023. Till today I am not even sure if it was cancelled, I am not getting any response after so many emails I have sent. I then receive my Invoice and it was so high I sent an email enquiring why its high I have not been answered, the last email I received I was told I was charging a prorate and I aske for what, then the answer was no you were not changed the prorate. I have never even once missed a payment I pay on time in full now this is what Ima getting from MTN SOUTH AFRICA. When you call their call Centre you get different people all the time and no one has even tried to assist me with this. Can sameoe pls help me , what is going on with MTN