http://gamersvoice.org.uk/
Click the "contact us" section to send a message.
As you may or may not be aware a few months back Gamers Voice took action against Activision for the state of Black Ops on PC and PS3 due to how buggy and broken the game was, i recon this game is almost as bad as that with regards to issues and as such should be treated the same way.
If enough people complain about it maybe Crytek or EA will actully admit to the issues and admit they released it unfinished and do something about it (or offer a refunds).
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Feel free to disagree with me but considering all the posted issues i recon people are well within there rights to complain about a product they payed for when that product isn't working as it should be.