I'm local to Fort Lauderdale and occasionally rent from the Fort Lauderdale Downtown/Beach Avis location. I think they are managed by the same people that run the FLL location. One time when a representative is having system problems he had me wait while he "called the airport" for help.
If you can't get someone at FLL to answer, you may try calling this location. There probably won't be a manager there, but someone should pick up and may be able to transfer you or give you a direct phone number. You could also try asking for an email address.
Phone: 954-462-7400
Link to location information:
https://www.avis.com/en/locations/us...lauderdale/j1j
Hours (all times Eastern): 8am to 6pm Monday-Friday, 8am to 4pm Saturday, 8am to 2pm Sunday