Supersonic Fiber client service

I had Fiber installed and the router was delivered a few days later. I then joined their WhatsApp chat group and said that my internet light does not come on and therefore I don't have internet. I spend the most of the day on their chat line (please note I contacted them at 8am) at 16:45 I was still on their chat line and nothing has been solved. Today it's the same story, 2 hours later and I still sit with the same problem. If I knew this was going to be how they treat their customers I would have not joined up with them. Am seriously thinking of canceling this contract and choose another service provider. So disappointed in their services!!!