Not an auto body pro, but -
This is worth a try and often works: Push down on hood in area of the latch - fairly hard - and let up - sort of like a push button pen.
If that fails, is it possible to remove the grill from the exterior to access release cable?
If no, is it possible to access release cable from inderneath the radiator area?
Are these latches activated from inside by a handle? You may have a stretched cable and need to grab it with a pliers for more movement.