damn bro thats a huge pic lol im just kidding... honestly bro thats a minor thing... i would however ask the vendor for at least some of your money back or like a discount on another part you would like to purchase.... i cant really tell from your pic but as long as its just a chip a lil bondo and 2k primer would fix it right up... the only time you would worry is if its a crack or hairline crack because that would spread....
so dont sweat it man... i think if you ship it back youll pay more than to have it repaired just my 2 cents bro