Unfortunately its nobody else's responsibility to replace your damaged game. If you wish to purchase another English copy of the game, you could buy it from a website in the UK like Amazon.co.uk, just make sure the seller allows international shipping.
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Activision does have a disc replacement program, normally $20 US for North American replacements. I don't know about Europe, though, especially a disc for a region other than the one you're in. Have a look around their site.