What I would do
Worst case scenario is return for refund as item was not as described. I'm presuming you are asking the question because you have an interest, damage not withstanding, in one or both tickets. If that's the case then as previously suggested, communicate that you are open to keeping them for X$ reduction for the damage and see how the AH responds. They might be uncomfortable and give you the option to keep them or send them back as is or they may negotiate with you. Sorry to see that happen.
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