No problem solving or service

Pathetic service. After previous complaints falling of deaf ears I still complain because I was promised a 6 month double line speed promo when I asked for a 10/5mb line and now I have a 20/5 line for 6 months but the problem is the prices where adjusted and I moved up to a 20/5 line and I am paying for it so I am not getting the double line speed for 6 months I am just paying for it. I also logged a call saying that my internet is intermittent it works then it doesnt then it does and just constantly not being constant. I receive a mail back saying issues is resolved however i wasnt even called and it isnt resolved. I also logged a call regarding the double line speed promo and nothing happened? How many times do I have to log a call or complain before something changes? I have had nothing but problems with vox fibre since even before I had the ****** internet. My boss has no problems with his afrihost fibre and we live in the same area. If my problems do not get resolved I will demand cancellation without compensation as I am not receiving the kind of service that I should be. Even if i could just be communicated to and understand the problem that would be fine but vox has the worst problem solving I have ever seen because it simply isnt there! Fix it or cancel it so that I can move to afrihost and be done with these unnecessary problems that I am paying for