Oustanding refund on contract cancellation

I was sold a Fixed LTE data contract, online, in January 2022. After 3 months of struggling with signal, I was informed that I do not have Fixed LTE in my area, and should never have been sold this contract in the first place. My ZTE modem was handed in at my local MTN kiosk in April 2022. That 19 months ago...

Having been been billed right up until June 2023, I have, after countless calls and email, been informed that the contract was cancelled in May 2023, I am told. I was even charged a cancellation fee for a product that does not work in my area!

To date, 8 August 2023, again after numerous 'escalations' nothing has been done to refund my payments, as well as the wrongly charged cancellation fee.

Please settle thus matter now. And please don't tell me that you will escalate the issue. That's been done countless times. Just fix it please and refund my money. And it will be the decent thing to do if you could also include interest payments on the outstanding refund.

This reference number may help. *** was cancelled on 13 May 2023