Sim not provisioned issue

Previous weeks i have been receiving messages regarding sim swap request and i have rep**** no to all of them cause i thought maybe someone was trying to perfom sim swap on my account the last time i received that message was on the 26 june 2020 after that the sim said SIM NOT PROVISIONED i took my husbands phone and tried to call mtn so i can ask about what happened on my sim card one call centre agent said there was no sim swap perfomed but it shows that my sim card is business number and its under contract well i was shocked to hear that and i asked politely how can i resolve that issue, the agent said they will transfer me to contract department well i wait luckily the call was picked and the agent said my sim is under contract but what shocked me more is that i haven't app**** nor receiving a message or a call asking me if i want contract or not but only to find that my sim is on contract. I asked politely what can i do some agent said i should go to my nearest branch some said they cant help me some said i should stop that contract ....i went to the branch several times and they were rude and they said they cant help me then they called next customer...today i called *** but all the agents kept transferring me to other lines and they didnt help and im so frustrated regarding my cellphone banking as well as applications i had made from schools and my sim was the only way to help them to contact me......please help me. thank you.