MTN contract cancelation is a struggle. YOOOOOO JESU

I have been trying to get help from 135 , From retentions , from ignition , MTN south gate, to MTN sandton

my contract ended in may, but till today i have been trying to go on pre paid, i was advised to be on a 0 month to month, then they still expect money even though i did not upgrade. my phone get's locked from making calls, then now its suspended. now I'm told I did not cancel my insurance, I am extremely tired of MTN. They make you wait 45 minutes on the phone sill no results. I have so many reference numbers I don't know which one to even follow up on. ***, ***, ***, ***,***,***, ***, ***,***, ***, all these represent the number of times I called and waited on the phone the whole day. now I'm told it's 5 pm another weekend with a suspended cell phone all because I do not want to upgrade