Do you know what this film is called?

I have been racking my brain trying to remember the name of this film, and google isn't helping, so I thought I'd apply to the hive mind and see what comes out :)

It was a French film, released in the UK IN 2011 I think, about a young woman in a sort of urban fantasy world where she fights monsters and there are mummies and zombies or something? And she carts a zombie around in a wheelchair? I only saw the trailer, never quite got to see it but I really want to.

Anyone have any idea what I'm on about?

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