Ongoing Internet and line problems for the past 3 months

We are continuously having issues with no landline service and internet speed issues. This has been going on for the past 3 months or so now and its becoming unbearable. We are paying almost a R1000 a month for services that we arent recieving. The last time this happened, our line was completely dead(no internet or landline) it took almost 5 weeks just for the technician to call us and we were billed for the entire month as if we used the service. At the moment, our landline is out and we are only getting 2mb/s on our 10mb/s uncapped line. This is becoming really frustrating! We run a business and our business depends on our landline and internet! We cant be suffering continuously like this and be paying so much for nothing!