Bad service

Good day, we stay in Glen Austin Midrand for about 6 years now. From the start we had problems with signal. We will then phone and complain and then they "fix" the problem for a day or 3 it is okay but not great. From the start they promised that they are busy putting up a new tower, ja wright. We all have contracts for years, my sister has got a company from home and people needs to contact her to book but do get through because there is no signal. I can't believe that a company so big can't do something. We have to get additional wifi from another company because we have no signal.