Mweb Fibre is TERRIBLE

Honestly the worst experience I've ever had with WiFi. I started my fibre ( 4 Mbps uncapped) contract in January 2018. Since day one of my connection, the internet connectivity has been intermittent as well as extremely slow (0.1 - 0.3 Mbps). The WiFi dropped about every 10-20 minutes every single day. I have logged over 10 queries online as well as made multiple phone calls ( R800 spent on phone calls), I have been sent two routers and have had vumatel come out to check the fibre lines (nothing was wrong with the fibre installation). I am now at my wits end regarding this matter, 5 months of paying for a Wifi that doesn't work? Absolutely ridiculous.