No notifications at all for when people register for zoom events in our hub

When we schedule a zoom event in our hub and people register, we do not receive any sort of notification. We have the little box checked in our notification settings to receive an email and a zoom notification (in the zoom events hub notification center) when changes are made to the event. Yet, we do not receive any sort of notification. I have had a ticket open for 2.5 weeks with Zoom support, but get no where with their service team. It's frightening that we pay a lot of money and cannot get answers. Any advice on how to receive an email notification when someone registers for an event would be helpful.