MTN = COMPLAINT= BAD SERVICE

I have app**** for one of those month-to-month uncapped LTE services online. I received the router and sim on 12/10/2024. I could not access the internet and loged a support ticket. Support indicated I have not service at my address and I should return the free to use router. On Monday 14/10/2024 I went to MTN store and returned the router. I signed some documents and that was it. My upfront payment was never refunded and MTN keeps on debitting from my account ever since. I have called 135 and they refered me back to the store, I went to the Store and they refered me back to phone 135. I have tried this several time without luck. Can someone help please as MTN service suck!!. You cannot get an online application cancelled nor can you get your refunds of all the money you paid for zero internet service.