Service doesn't work properly + IMPOSSIBLE to reach tech support (screenshot attached)

Service doesn't work properly + IMPOSSIBLE to reach tech support (screenshot attached)

1. System returns "Domain name already exists". 

How to fix issue with adding Help Center? 

[Setup > Help Center > Add Help Center]

2. Is Zoho tech support always unreachable by phone?... 

Funny thing is phone system always says " You Are Caller Number 1"...

Last few days I spent hours on hold - attached screenshot of few recent calls...