Revolting customer service and no accountability

Fibre with Supersonic is anything BUT simple! I've been struggling since 3 June 2020 to get activation of a line - fiber and router both already installed. I have wasted hours on the phone to the call centre, frequently getting cut off and being transferred from pillar to post without help. 7 times I've been promised that someone would call me back and NO ONE HAS EVER PHONED BACK.