Trapped on contract and number hacked

I have been treated so badly by MTN after 20 years of being a loyal customer. I called MTN last year in October trying to upgrade or cancel the contract end of the year as my contract was going to end but the agents never canceled it until January 2024 when the guy who assisted did cancel and told me to go pay because MTN put me on the month to month contract that I never even agreed to which was happening for the second time. In February, I did not the network coverage from the 5th even though I will be there for 2 days and will have it the next day, I have but around the 10th, I never had a network at all until I called MTN and was told that I am active on their side and after 2 weeks I went to MTN at Mooirivier mall where my number was deregistered and registered again and I was told to give it two hours before inserting the SIM card again but I did not have network coverage still. I decided to go back the next week of the 7th as there was R300 airtime bought on my bank app for the same number that I could not receive calls or make calls on due to the network. I went to the bank and I was told that it was bought by and when I explained that I have not been able to receive messages or calls due to network issues, the bank removed my number and told me to go back to MTN and still I was told to do SIM swap and no explanation regarding why I have not been having network while I am active on their side. On the 7th I went to MTN and found another lady who told me that my number was hacked, she brought it back and it worked after that. I found out that MTN loaded DATA in February even though their month-to-month contract had ended and on top of that MTN listed me without understanding and considering all I went through because the number was hacked MTN never assisted me. Why is MTN not following up on this matter and consider the fact that the DATA they loaded, I never used it and there was R300 airtime bought on my app that I dont know how and who used it. I have called their farud department but still I did not get, I am so disappointed hurt due to what MTN did to me. I hope we are not hacked by inside people because why would I be hacked after canceling MTN contract. This is very disappointing