I’m sure they had satcom voice — the messages over ACRS were via satcom.
But they had multiple failures by the time they plummeted so they were probably too busy to try it, or by then it wasn’t available.
Truly a nightmare scenario.
Few, if any, commercial aircraft are equipped for voice satellite communications as its prohibitively expensive. Instead, we have ACARS which uses satellites, but only transmits data — that’s how their maintenance base in Paris got the error messages from the aircraft.