React + Typescript Project - Refinement and Fixes only -- 2

My live SaaS runs on React, is deployed to Vercel, and stores data in Supabase. Production users are already in the system, so every change has to be safe, targeted, and fast. We are providing booking system for photography studio

Issue 1 –
Mismatched price between generated receipt and system

Issue 2 -
Time locking issue on booking form page (Time slot should locked when user paid , but there is other time slot that locked by unknown reason)

Issue 3 -
Booking & payment issue via FPX.
These bugs exist where payment is sucess but booking not made. Payment is fail but booking is made.

Issue 4 -
Other bugs that will be added later



Deliverables
• Pull request(s) for each of the fixes and refinements
• Brief deployment notes so I can push straight to Vercel

I’ll share access once we agree to proceed. If you’re comfortable debugging React state loops, Supabase auth, and hot-fixing production apps, let’s get started.