Bad service!!!!!

I have had endless problems with my fibre from SADV. For the past couple of months, I have been complaining about having no service and the internet goes down up to 12 times per day. No matter how many emails I sent, nothing was done about it. Phoning them is useless because you stay number 1 on the call line but nobody answers. So instead of coming to look at the router, they send me an Ethernet Gateway but without informing me. So I plug it into my router and the ethernet gateway cannot pick up my fibre router. The light stayed red. So I phoned them again and am still waiting for the technical support team to call me back concerning the ethernet gateway as they have to see why it cannot connect to my fibre. One problem after the next. I need fibre for my Online teaching job and the foreign countries dismiss us if we have internet issues. I have had enough of SADV now. Time to look for another service provider before I have no job.