MTN

I'd like to lodge a complaint about MTN cellular network. I bought my home hauwei router online and received it on the 29 October 2021. Since I've bought it, the data was not available, I was unable to connect. I called mtn for a month almost everyday so that they could check my coverage and connectivity but no one was able to help me all they did was direct me to different numbers for a whole month. I even decided to go in to the mtn store at South gate but the employees were unable to help and the manager refused to see me. I called in again to mtn and one female consultant advised me to take the router and Sim card back to the store and I did that, I returned the router and simcard and I have a copy of the customer return form. Then the store gave me a reference number and had to call back in to customer care cancelations to cancel.I've called in to cancel more than 3 times but still every month since November. I've been debited almost R2000 now for a router and data that I have never used nor have in my ownership . I received another SMS in this week that my debit order would go off on the 31 January 2022 and I refuse to pay another month for something I don't own. Kindly assist me in this matter.