MTN home router ****

I got a call sometime end June from a MTN sales agent, they had all my details how much I was spending on data per month. They then offered me a home router that worked out cheaper than what I was spending a month on prepaid data. The agent asked for my home address and he confirmed that there will be coverage in my home. Indeed the router was delivered on 5 July 2022. The router has never worked and it always showed limited connectivity. I tried calling customer service and they rebooted and configured the settings but still nothing changed. When I found time from my busy work schedule I went to my nearest MTN store and I was told that the router will never work because there is no coverage in my area. I told to call customer service to cancel. I have been trying for the next 3 weeks. I get through to contracts and I narrate my story. Everytime when I mention the fact that I want to cancel the agent will say hold I will put you through, no ever picks up or they just drop the call. MTN please stop repping us off , I am paying for a router that is not working that you knew won't work in my area now you are giving me a run around when it comes to cancellation. Just know you will want a cancellation for something that you knew that it won't work. Fix this urgently.