Sad Situation with Supersonic

Extremely poor service, I signed up with Supersonic, on the 20th January 2024 installation was done, up till today, 11 days and still no internet, it says it has an authentication problem, am I'm back and forth between Zoom Fibre and Supersonic and no one has helped me to get this right till today. The call centre gives you a story off putting the modem off and on and thus forth, tried everything, and it doesn't work... Supersonic doesn't even go the extra mile for their customers You are just left to hang... And Currently still sitting with a situation, now with no proper feedback and help, I will need to change the service provider