Appalling service from Supersonic

I requested for fibre to be activated late Jan. I have had 2 technicians come to my place and leaving the routers behind and stating that they will be coming back to fix an issue that they picked up. 3 months later this is still not done. Last week, I cancelled this nonsense deal with them so that I can get fibre with another company. I can't get fibre because they are holding my line. I'm so disgusted with their incompetence and inconveniencing me. I'm working from home with no internet