terrible service

Our phone line and internet constantly is out of order. As paying customers we called and reported the error and was told to check our equipment ..as if we haven't restarted the modem hundreds of times and checked connections. Then we told the exchange is down technicians are on it. After being down for 3days, its up and running for a day and down ever since. I resorted to reporting on their facebook page twice. They kept saying they will get back to me but never reports back with a solution. This is causing such an inconvenience as I am in the midst of job hunting and and submitting my assignments online. Please help!