New API: Pricing Plans Backend Functions and Events

I’ve already created a post

https://www.wix.com/velo/forum/coding-with-velo/building-a-custom-paid-plan-section?appSectionParams=%7B%22origin%22%3A%22member_posts_page%22%7D

And its been more than a week since I asked wix support assistance.
We are under a very (very!) tight agenda.
I would deeply appreciate your help on this matter.

Thank you!!!