Please see: How to buy push notifications?!
If you can’t help, could you please ask someone who can to have a look and get in touch please. I did contact support nearly a week ago and I contacted sales yesterday. We have 33 users, a bunch of mates talking about beer and tech, and we aren’t ridiculously active, but we get through 40-52k notifications currently. Your pricing plans (pro, at least), would work out at $2,400 USD/year. That’s extreme for a bunch of mates keeping in touch.