Bad service and no connection

I am a new Vuma client and all I can say is, DO NOT BUY It. It is nonsense network and their customer service is even worse. Since I installed it, I have never had a stable connection, ever! Their WhatsApp lines are never answered, they're phones take you straight to voicemail or you hold for longer than 5 mins then they cut the call, and never call you back. I have never been so frustrated and annoyed before because we use fibre to work, so I don't know how to be okay with not having a service that I paid for. This is nonsense. Nx.