FNB private banking is appalling

Tried calling private banking more than 10 times since yesterday afternoon - absolutely no assistance. My designated private banker cannot be contacted telephonically or by email. Others who answer don't know what to do - they say the system is not working. I request being put through to someone senior but nobody can do that either. I need help with my home loan but find myself stranded. "How can we help you?" - it seems you can't!