E-mail issues

I'm trying to reset my password due to others accessing my account but the problem is that I have a couple of emails but neither of them are the registered email. So I'm not sure what email my account is registered to. I have the billings from paypal for ZP I've got recently and in the past but my paypal uses my current email. My IGN is Kyle_Katarn. I'd like to switch the email to my current email but once again can't due to the reason I just mentioned. I'm not sure what all can be done if anything. I appreciate any input. Thanks!