If they pay for Google Fi and Google Fiber then obviously they can contact customer support. There's a phone number and everything.
The account was probably an error in fraud/spam detection. Yes it sucks but just call Google, man. C'mon.
In this particular case, "help me get this seen by someone at Google" and "I've resigned myself that the account is likely gone forever" is just attention-seeking.
I'm sure an account rep will escalate it and the account will be restored. It's not like Google goes and instantly deletes all the data with someone's account with they flag it for suspected fraud/spam.