Paying the Non existing Contract.

Good day, I am very disappointed the way MTN conduct it's business. i app**** for the Wi-Fi Router in June 2020 at MTN Centurion Mall I realized that the gadget was not working and kept telling the guy I took the contact with, on the seventh day I went there to cancel the contract and was convinced that they will check the problem in the gadget, i was told that it was not Rica'd that's why it was not working. I went home but the problem still persist and on the 3rd day I went to cancel the contract as I was desperately in deed of the Wi-Fi connectivity to work from home. I cancelled the contract and i was told that it go through the customer service, I was told not to return the gadget and I insisted that i cannot cancel the contract and still have the gadget in my possession. i was told to bring it and the lady who is the supervisor told me to come back on saturday for confirmation. when i got tehre she was not on duty and the gentleman who assisted me called her and she confirmed about my case that the cancellation must proceed. i gave them everything back and still every month MTN is deducting R228 every month without rendering any service to me. i was told that people working at the cancellation are not there everyday hence the delay but it has been 3 months now paying for the Gadget that does not exist. can you please assist dealing with this matter as I know they wont refund me.