Supersonic have breathtakingly bad customer service.

This isp is terrible. I signed up for a line and have spent the last three days been unable to get hold of anybody. Don’t bother trying to phone, they don’t answer(actually convinced that there isn’t anybody there to answer). Their watsapp may result in a response 3 hours later if you’re lucky and then it’s somewhat 50/50 whether they actually do something useful. Stay away, I’m stuck with them now as I signed up and I’m sure releasing the line will be as difficult at least as signing up.