MTN Sim swap whoes

On about 17th I cancelled a contract on ***) which I was not even aware of. I was told to wait for a month for a cancellation to be finalized, the 23rd of February to be exact. I tried to do a sim swap on *135# after the 23rd but I got a message that I cant do on this price plan. I contacted the contract department to question this and I was told that my number is still on contract when I asked why because I requested contract cancellation more than a month ago they referred me to cancellation Dept where I was told the my number is on prepaid and I had to go to the branch for assistance. I went to the branch at somerset mall and I was told that my number is still on contract they can't assist. I do not know what to do now because I have done what was required from me and I don't get assistance.

I need to stress that this is my main number that I have been using for many years, now I cannot be reached since January this year. I am frustrated from being sent from pillar to post.