Telkom LTE

I app**** for LTE internet home unlimited @ R899 per month I received the device on the 11th of May 2020. I was told it will take up to 48 Hours to activate. I waited and on the 16th of May 2020 I went to the local Telkom shop to test the unit as I could not get it to work. I was told by them that the device is working fine and that there where I live there is no LTE coverage and I should cancel the contract. I sent a message via the website to cancel the contract on May 20 2020. I was then contacted 2 days later and was given another alternative to convert the sim to pay as you go and that someone wil contact me regarding the change. Still to date no call back. I suspended the sim via my telkom app and received a bill at the end of the month. I went to a Telkom shop and asked for assistance I was told that they do not work with LTE contracts but I can request a call back. So I did. Call back after a week. Still no resolution. I just received another bill. HOW CAN I Pay for something that I cannot use? Quick to sell you a product but terrible at customer service. There is no customer service!!!!!