No communication works to sign-up

Unfortunately, tried all means to get someone from FedHealth to talk to me and explain a few queries, as was planning to move under them, online chat is useless, with no (call me back) option. Now I am worried if this is FedHealth's communication, then imagine those moments when ER, authorisation, or claims are needed. Really frustrating experience from a reputable business. Seems no luck to leave Discovery which I am really fade-up. I can't just complete the online form before my questions are answered.