just out of interest are you saying the toe piece is missing the black plastic bit right in the foreground of this picture that 2 screws are meant to go into?
and your binding is held down by the two screws at the back just in front of the slider?
if so thats awful.
the marker jig has the 4 holes you need to drill for the toes so clearly marked out. you need to be a total moron not to notice and drill them, and if the tech did drill them was he not made aware something wasnt right when they had the plastic bit left in the box with 2 screws and two unfilled holes?
I would take it back to the shop and show them. the binding isnt safe and the shop should pay to sort out the tech stupid mistake and putting you in danger. a toe piece with half the screws is way more likely to rip out (at least twice as likely)