The reason I would assume that there is no compensation is because you did not bring the issue up right away and now there is no way for them to really know who is telling the truth or not. Not saying you are lying but without actually seeing both sets of tickets, how would they be able to tell what happend? You would be suprised how many people try to scam free stuff... I would highly suggest that if this every occurs again, bring it to their attention right away and it can be resolved.