Appalling Service - WIFI ISSUES

I had WiFi for 2 years which was 4G LTE after that I got call to upgrade from4G LTE to 5G LTE the consultant name was Sphesihle vilakazi. Upon the upgrade ,it got delivered. it was hardly working and in certain places in my house the coverage was weak. This was within the first 30 days of having it and when I called I was advised to take it to the nearest branch,The branch told me that they can only cancel the contract and I'll be liable for a penality fee which is pay for 12 Months then I called the complaint line which I was promised for an investigation on the coverage and to take the product for inspection . Communication was received on the 17th July from Tamara Short who liaison that the coverage was fine and that if I want to return the product I'll liable for a fine with no inspection done on the product. I kept calling and complaining (***7) I'm basically paying for something that can't work and when I ask to cancel it then I'm told that I need pay for the contract for the next 12 months before cancelling which means I'm paying for a service that I will never get because the coverage is very weak Does that even make sense ??. MTN is not trying to give me any options so I'm stuck with no WiFi that I'm paying monthly for and I also work from home. I wish I never upgraded as this is the worst service ever 😡😡😡