Shockingly bad service

I bought a fibre product from Mweb which they installed in late October. When I received the router I tried to connect but no luck. The router connects to my device but there is no internet. I have phoned Mweb technical assistance twice and left messages on their query line. The call centre cannot help me and the on line query can only get back to me on the 10th of November. I bought the fibre product for work purposes not for entertainment. The service is atrocious. I cannot believe the lack of interest from their side. They sell a product and then renege on any assistance to get the set up going. Shockingly bad sevice.