does anyone know how to add, like a customer billing system like big companies have. i.e my customers can view their account balance, view their usage and paying. I’m stuck, thanks
Have you looked into using Wix Invoices app?
https://support.wix.com/en/article/about-wix-invoices
https://support.wix.com/en/ascend-by-wix/wix-invoices
From that section…
Tip:
Use Wix Automations to streamline your billing process. For example, you can send automated emails to your clients every time an invoice is sent, paid or overdue. Learn More
Also, with regards to a members only dashboard, then you can have a look at the Wix members profile tutorial which shows you how to create members own unique pages etc.
https://support.wix.com/en/article/corvid-tutorial-building-your-own-members-area
https://support.wix.com/en/article/creating-custom-member-profile-pages