Terrible tech service

I have been have internet issues for over a month now. Over the last week its has become worse where the internet will drop multiple times at day and is extremely unstable. I use SuperSonic as my ISP on a Vumatel line. On various occasions I have called SuperSonic and they say there is no issue they can see. It then gets referred to the senior desk where you have to wait for them to call you. I am still waiting for this call back. My latest reference number is CAS-793379-Q9D2X1. I have asked to speak to managers and they always not available. This service is beyond pathetic all the while they continue to bill me as my internet doesn't work. Vumatel cant do anything until SuperSonic get their act together. I will definitely be cancelling with SuperSonic