License Download issue

I just purchased the Cubase Elements 7 from http://www.amazon.com yesterday, and it arrived on this morning. after I installed the program and trying to enter my activation code, it told me that “The activation code has been used already.” I’m pretty sure that the one I bought is the new one because when I got the product, It was still sealed.(you can see my pic)
so, what I should do now? Are there anyways to get the new code? or I should return it back to amazon.com.

anyone please help :frowning:
Thank you.
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How did you get the activation code, was it packaged with the product? You should take it up with Amazon, this should not happen with a new product.

Thank you for replied, yes, it was packaged together in the box. When I got the item, it look new and still sealed with the plastic as you can see at my picture.