Who or how to contact re: licensing issues, inability to receive emails

Recently purchased a license (under a different email address).

I received the an email from “Link” (your payment processor?) with copies of the invoice and receipt.

However, I never received any license key or activation info.

Additionally, I do not receive the “login code” emails (though the website seems to think my original email address is setup.)

I had to setup a new account (using my gmail) to post this message.

So…who can I contact to get this situation resolved?

Thanks.