Poor service and no stable internet connection all the time

For about 3 months I recieve bad service from some guys at comtel. Theres some that try very hard. I just don't think that if a person is paying for a service that he should get no service. I'm really tired and fed up with comptel. Every time they send technician to my house but they they canot fix my signal. If been paying for a service that is useless to me. Every weekend they give me excuses that has nothing to do with me. I pay they must provide. Just imagen if I have a business for example, I advertise R100 for transport to work everyday, for a week. But now I recieve the R100 but fail everyday to get the client to work. And every time my excuse will be like, there now patrol, or my bussness is not steady,or people did not pay me in full. IT'S NOT THE CLIENTS PROPLEM. I was reasonable and pasient till now. I was very happy in the beginning with comtel but now I'm disappointed. Service down the gutters. This is now when I need internet the most in my house. It's exams for kids and for parents. Not fair