Editing text

Hi! Super newbie here.
We contracted an outside person to develop our current site. There have been a handful of mistakes: wrong addresses, phone numbers, email contacts, etc. I’ve been able to change most of them (and update the site in other ways) but can’t seem to find where the text is in the top bar, separate from the Page, to edit.
The frustrating thing is I WAS able to find it once to change the phone number, but I need to find it again to correct the email address and for the life of me have no idea. (I feel like I truly am going mad)
The site is: peerservices.org
Top bar: email deleted [Phone numbers in blue]
THANK YOU!!!