Mtn

I got a call from MTN the I am due for an upgrade in September 2021, I told them I don't want to upgrade because I am retire in March 2022. A week later I got a sms to say that I am now on a month to month contract for R147. 00. I phone 135 and told them I don't want that. The lady said she will cancel it. Then 2 weeks later6i got a statement to say that I am now on a contract for R39. Op. I phoned again. The a lady Jodi niadoo phoned me and said I must pay another 151.00 after I paid R58. 27 the week before. Now I am trying to phone 135 to find out if all is canceled, but nobody is answering the phone, Jodi niadoo is not answering my emails. I just want to know why did I pay for contracts that I didn't ask for.