Has anyone contacted Xero on the phone?
I think you’ve been scammed. Sorry.
No, Xero don’t have a help line!
Yes, this is a scam. Xero don’t have a help line, and never charge you for giving support.
The most important thing right now is to log back in to your account and change your password. Make sure the scammers can’t access your account.
I just googled Xero Phone number and got a company (not Xero!) that charges for Xero support.
I assume they hack your computer as well as your account. I’d seek professional help.