Burp-Suite Payment Flow Audit -- 2

I run the e-commerce site you will be testing, so you can proceed knowing full authorisation is in place. My top priority is the UPI payment verification path: today, staff still confirm transactions manually in our admin panel, which leaves room for timing and logic attacks... (Budget: ₹37500 - ₹75000 INR, Jobs: API Testing, Penetration Testing, PHP, Security Auditing, Software Testing, Testing / QA, Usability Testing, Web Security)