my phone keeps coming up with something and its saying can not identify sever the identiy of ro04.biz can not be verified

You probably got tricked into installing a rogue calendar; your phone does not have a virus. In the future beware of "free" offers

See this Apple support link→Delete spam calendars and events on iPhone - Apple Support

or watch this companion video:

Delete Calendar Spam

Go to calendars on your phone, youre subscribed to a calendar, one most likely that you didn’t mean to, or that was spam. The calendar name can be anything, it’s not necessarily named after the name in the alert you get it can be something as innocuous as “calendar 1”, which is what mine was called.