If the Self-help site said it has sent an email, you can be sure it has been sent so, the first thing to check is your Spam folder. This, of course, assuming the email you used to purchase the product originally is still valid.
If the original email is not usable anymore, you should contact support ( address is on the "Contact Us" page of this site ) indicating:
- the email you used to buy the product
- a new email you want to use from now on