Sorry to hear that you are having such trouble.
The plugin license will only appear in your iLok account after you register it on our website. To register, you need the SN, as well as a license key. The license key is different from the iLok license. The license key will be 3 sets of 4 characters, something like XXXX- XXXX-XXXX. You should have recieved that as well as the SN in the email from Reverb.com. Once you enter both on our site, the license will be deposited in your iLok account.
If that is not the case and you didn't recieve a license key, please forward the email you recieved from Reverb.com to firstname.lastname@example.org, along with your iLok account name and Eventide account name, and we will get you sorted out.