Not sure, without actually seeing it, but I do not think the stainless bit should be just lying there.
I would contact the dealer where you bought the board and see if they can get you another mast
track assembly under warranty.
If the car slides back and forth OK, you should be able to remove all the screws that hold it down in
Perhaps if you get it out where you can manipulate the pedal more easily you could get the spring
back in place.
But contract your dealer and Trident Sports first and see what they suggest.