Regretting my decision to sign up with Supersonic

I have received my fiber router but I can't get hold of anybody at Supersonic to activate the router. I tried calling and were just left on hold for 40 min. Whatsapp line just does not reply and when I email them I get a response that the email is unmanned and that reverts me back to WhatsApp or the call center. I don't understand how a company can be so useless at customer service. You just have to activate my router and then you can get my money. But this seems to be an impossible task with Supersonic.