They do reimburse a nominal amount for shipping in the case of damaged, faulty or incorrect stock. I think in your case you could fairly claim incorrect stock if a steelbook was pictured on the item's sales page. It won't fully cover your returns costs but it'll help at least.
Amazon.fr's response to these cases is usually a big fat middle finger. As far as they are concerned, if it doesn't say Steelbook or Metal in the listing or title, it's listed correctly, picture be damned.

Great price for a sealed one too, well done bud, who needs the inferior copy when one can get the best out thereJust picked a new/mint one of these up from eBay for £28.99 including postage, not a bad deal I think? I know the uk one is coming out, but I kinda HAD to have this.....
Wow! Didn't know this had went up in price. Is this OOP?
Thought still available from amazon.