Vox bad client services

I am done with Vox telecom. I am experiencing a ping of over 1500ms. I reported the issue to Vox for the first time in Feb or March. I had to struggle with them for more than a month to sort out the issue. Eventually, they managed to get it somewhat ok, but not 100%. Now I had to report again ping issues in May similar to the first report. If I don't phone, I will not have an update. They do not phone you, if you need their assistance you have to phone them. I see on the website on my profile they say my problem is solved, yet I am sitting with a ping of over 1000 again. They will blame Vodacom for it, as they cannot find the problem on their side. I cannot phone Vodacom and find out for myself what is going on. This is what I pay them for. Why I am still using their services is something I can't answer myself.