What Mweb doesn't tell you

A few months ago I received a message on my phone offering me fibre connection instead of ADSL for the same price as my ADSL subscripton. When I phoned the Sales department the price advertised was hiked by R250 per month. I had decided to take fibre nevertheless. After the fibre was installed by both Vumatel and MWeb I have activated my fibre. After installation, I lost my Wifi connection and thus could not use all the devices requiring Internet access in my home. I phoned to MWeb and received the following answer from the Support team. I must hire a technician to fix the problem, that it’s not their job to help with that. I did invite a private technician and received the following advice. The quality of my router was very bad (the Mweb issued router) it doesn’t give a strong signal, after the technician activated the Wifi (which was not enabled by default for some reason). I would never have signed up for Fibre from Mweb if I knew I had to incur additional costs to be able to have a Wifi connection in my house. So my question is what I should do in order to receive a good Wifi signal since the Mweb support team refuses to help me? I am tired of paying lots of money on my telephone bill, because of so much time spent on the phone to Mweb due to such bad communication.