no coverage for home router

My name is Ntombifuthi Ndlovu, In may 2025, i received a call from an MTN Consultant promoting a home Router. I was interested and she confirmed that there is coverage in my area. I entered into a contract with MTN SA for a home Router for a period of 24 months. the product was delivered at my workplace and when i arrived at home there was no coverage and the Router could not connect. I called MTN 135 free number and I was sent from pillar to post, eventually i was advised to take the Router to any MTN shop. I returned the Router to MTN shop at Empangeni- Sanlam Center and given a reference, and told to call 135 to cancel the Router. I have called the number many times and they emailed me a form to complete so that the Router can me cancelled and when I make a follow up, there is not response. for the past two months MTN is deducted money from my account for as service that i don't have. this is very frustrating and request the this be cancelled as they eventually told me that there is no coverage in my area and yet the consulted who contracted me confirmed that there is coverage in my area. I don't want the product anymore and require urgent cancellation