My WiFi is down again for 3 weeks in a row.

My WiFi has been down for more than 24 hours now, this is the third time in 3 weeks. Last week I waited todays for the reconnection, I work from home, am I gonna have to wait for another 2 days again? Some one called yesterday and promise to send a technician,I waited the whole day, I called again this morning they're still sending a technician. Their WhatsApp number is useless, there is nothing you can ever get solve through their WhatsApp because they are using a bolt that is always quick to end the chat, I'm really frustrated and of this service provider.