Still no fix from WebAfrica

Still no response or fix from WebAfrica. Received a reply to my online request for tech support on Tues 12 May. I responded and then never heard from them again until Friday 15 May - when they just repeated what they told me the week before - which hasnt worked. I had a IT consultant install two ping tests - one monitoring my wifi network and the other the internet connection. The wifi network is working 100% but the internet connection has daily drop offs. This means it is either Open Serve (who've been out to my house twice now) or WebAfrica. Open Serve find no connection failures and WebAfrica refuse to accept the drop offs are real.