As everyone said, open a ticket.
But to get printing again in the interim while you are waiting for parts, you can tape them down.
If you have good strong tape that won't gum up your machine that might be enough. For most of us, the best solution was the combination wedge/tape trick.
Cut a small piece of card stock from a business card or heavy paper and fold it a once or twice and make a very small wedge shape. You only want it about the size of a fingernail. If it is too big it can put you off-level, and too small will not hold. Push down on the laser head, you will see it goes down below level with the base, that's where you slide in your tiny wedge. Release the laser head and make sure it holds. Then fold over the top of your wedge flat, and for good measure a good non-residue piece of tape over the whole thing. Then put your build plate back on and you should be good until you get the replacement parts or upgrade kit, whichever comes first.