PENKO:
Forgive me if this is stated or resolved already, but in an Airbus like the 320/330 you don't usually follow the actual VOR signal, but you follow a preprogrammed route from the database. This is base on GPS. So why focus on dodgy VOR's?
Libya is
not a WGS84-compliant country, so the GPS is not supposed to be used as primary navigation on an instrument approach procedure. I can't speak to Airbus, but in a U.S. OEM vendor supplied database the approach mode should not activate in Libya.
WGS-84 Updates - Jeppesen