Someone has used my email with Apple..

I have gotten two emails about someone purchasing something with Apple. For some reason they have put down my email to send the confirmation information about what they purchased, which was about a thousand dollars worth of stuff. They are not using my credit card, which is good, but I don't want information sent to my email about stuff I did not order. What should I do? I had no idea of how to contact Apple.

Please help. Thanks, Amy.

P.s. This person has bought whatever it was in California, and I am not from there, so I'm really not sure how they would know me.