Wifi - charged for a product I am not using

I entered into a home Wi-Fi contract with MTN And Mondo mid July. The router was delivered however it was not connecting at home. I called MTN several times requesting for assistance and the router never worked. I cancelled the contract on the 8th day after delivery and i was informed that I will not be debited if I cancel within 10 days.

Today it is almost 4 months and I am still being debited a lot of money on a monthly basis for a product I never used. I’ve been constantly following up for my money to be refunded and to stop debiting my account and they constantly tell me to keep on waiting. I’ve spoken to 3 various consultants and still not assisted.

Hello Peter team, please assist me in resolving this matter.