Unable to convert a month-to-month contract to prepaid

I have been trying since the 29th of August to cancel a month-to-month contract on my WiFi router.

Every time there is an excuse such as your profile is locked or go to a MTN shop.

I eventually went the Bredasdorp store on the 31st and there they could not access the system.

Bredasdorp is 30km from me and the petrol cost is R180.00

Today I spoke with a so-called service champion and he tells me that there is a penalty to be paid for cancelling this month-to-month contract! A penalty on a month-to-month contract? This is the first time that I have heard of a penalty since the 29th of August. Also he did not inform me of how much the penalty would be after I specifically asked him.

I wished to speak with somebody with authority who knows what is going on, but the consultant refused to put me through to a supervisor and said that he would forward my details to his supervisor, but I know that it will come to nothing as I am still waiting for 20 (not exaggerating) other supervisors to call me