Congratulations and welcome to the ISSAP club!
The notification should be the same for all certifications (i.e. 2-5 business days) but it's not unknown for the emails to go missing.
Have you tried to submit your endorsement application?
When you do that, if it complains that you need to have passed the exam within the last 9 months then you'll need to speak to Member Services as this would indicate your issue is more than just a missing email.
If you do need to contact them, my recommendation is to call them first thing tomorrow and keep calling until you speak to someone as leaving voicemails or sending emails takes a while to get a response, and you've been patient enough!