Very Unhappy customer - MTN Data Sim contract

I actually don't want to give a star, one star would mean they are doing something right. I am currently having such a terrible experience with MTN, calling the 135 number for the last 3 weeks in order to cancel an already expired contract. I am transferred from one department to the other and when I finally get through to cancellations, the call drops. How's that for customer experience and rocking your world.

I had a data sim contract which expired, the amount as agreed was R199, some months more than this amount was deducted with no explanation what the extra is for. After the contract expired, I called the call center and was told by a team leader that an amount of R576 was due. My question, what for? I never agreed to that amount. I am told it is out of contract rates. Excuse me, I never requested the contract to continue. I have sent emails, made more than 15 calls and even left a DM on the instagram page but NO REPLY.

In my understanding, when a contract expires it is cancelled automatically unless the customer requests for continuation. This is clearly a money making scheme from MTN to claim more money from their customers and call it out of contract fees.

Dear MTN, please setup a contact center that actually assist customers properly.