Poor service delivery from Vox and VUMA

I logged a call with Vox Telecom regarding a "fibre to home" connectivity problem I have. The modem continuously drop my internet connectivity. When I phoned them 5 days later after I haven't heard from them their response was that according to then VUMA resolved the problem. So where is the gross incompetence ? Vox or Vuma? I am very disappointed with both these companies as I had a very positive business interaction with them in the past.