MTN Month to Month Contract is a ****

I took a month to month contract with MTN November 2020 where I was supposed to pay R259 for 40GB, 20GB during the day and 20GB at night. I was required to pay first before receiving the data of which I did, then received my data.

I was further told that since it's a month to month contract, I can cancel anytime or if I do not pay, then I won't receive data.

Last month in August 2021, I called MTN Customer Care to cancel the contract, and I was advised that an Invoice for September has already been generated on the 25th of August and as a result blocking them from canceling my contract. I asked how is it possible that an invoice was generated for a contract that was not even paid for.

I then agreed to pay for the month of September on the 1st Afternoon, and at that time, I had already received data and I found it odd as I had not made any payment.

I called again on the 22nd of September 2021 to cancel as I was advised to cancel before the 25th. To my surprise I am told an invoice for October has been generated and blocking them from canceling. That I need to pay first so I can cancel. Furthermore, when I cancel, I will loose all the data I would have received. Then my question was, so I am just going to give MTN R259 so they can cancel my contract, and topping up with taking away the data I paid for.

MTN please cancel my contract, the initial agreement was if I did not pay, I don't get Data. Now I'm being forced to pay for data that you will take back. You want to keep my money and my data.