Does anyone know how or where I can this thing removed off my car bumper?

I parked at Walmart earlier today and when I came back, someone left a beautiful surprise for me! And guess what ladies and gentlemen?! They left a sticky note on the bumper where this gash is at? And do you know what it said? "Sorry:(" that's it folks. No information no nothing. I hope he or she, gets in a car accident and breaks every bone in their prick body. Anyways, sorry for rambling on, does anyone know how to get this removed? It's a good size deep gash. But it's a plastic bumper of a 2000 Honda Accord.

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