Gutted for you :-( some a.holes out there.
If you do a search there's plenty about taking off the bumper. Basically just a number of screws to remove which you can find locations for on other threads. The only bit you need to be careful with is you need to put a bit of force to detach the bumper from the wing and don't forget about the feeds for the washer jets if you have them for the lights.
I'd also out something soft under the bumper for when you remove it so it doesn't drop.
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