NO MTN service continuously for 3 weeks now

I have been unable to connect using my MTN wifi for the past 3 weeks now. I have phoned numerous times and have been told it is a bad signal in the area. It is very disruptive and I cannot work remotely due to MTN no signal, so I am paying monthly for something that does not work. Am having to now find other service providers due to no service which is unsustainable.