Supersonic ridiculously poor admin service

Supersonic offers brilliant service when you first sign up. Post installation support becomes a nightmare. I've been struggling for months to get them to stop charging me for 3 active lines whilst I have one active line only. It is impossible to get satisfactory response on any of the provided platforms i.e. whatsapp, email or phone. I have received numerous reference numbers with promises that my case was escalated and that it will be resolved before the next billing cycle. It's totally ridiculous! I really wish someone within Supersonic could take ownership of the problem and get it resolved.