Vox Telecom Terrible service

Vox Telecom has installed an inadequate router to support recent fibre installation in my home. the router is not able to cover specified area as promised. I have then requested that they de-install the router as it obviously does not cater for my requirements. They insist that I pay for cancellation fee even though the cancelation is driven by their services not meeting standard requirement. The solution offered to resolve this issue was never presented on first sales pitch without the inadequate performance of the router mentioned either. they require me to purchase additional units to the value of approx R3500 which is ridiculous vs other services offered by their competition within the same area.