Supersonic worst ISP

Trying to resolve fibre connection since went down Friday 21 May. Phoning them after waiting in queue since caller 38. Get trough trying what agent said still not working, agent said technicial will call. Still not call from technicial phoned again nr 76 in queue next day...tried for 38min online trying to resolve still not working. Phoned again today 27 May 38 in queue put down phoned new sales trough immediately asked to be transferred to cancelations and again nr 28 in queue. Phoned call centre again ask for the first time for a case nr. No one gave me a case nr this whole period, asked to be transferred to cancellation again 42 in queue. Bad ISP DONT WASTE YOUR TIME WITH THEM. No alternative way to call or mail them....