I'd change your email password and the passwords for anywhere else that uses the email address, just in case. It could be a phishing email or it could be that you've somehow ended up on a mailing list.

Maybe it IS a gift, though? Is there anyone with whom you've lost touch that might have had your old address/etc. and might be compelled to send you a gift?

I did some digging and found this for you: worth trying, anyway.

800-727-3682 email, support@parents.com