MLBB Diamond Recharge Site Build

I need a fully working Mobile Legends: Bang Bang top-up website that feels as smooth and trustworthy as the big gaming-recharge portals. The flow for my players is simple—login fast with their mobile number, receive the OTP instantly on WhatsApp, pick a diamond package, enter their UID + Server ID, pay through UPI, and see the diamonds appear automatically on their account.

Here is what I expect you to deliver:
• A mobile-first, professional and sleek UI that loads quickly on any device.
• OTP-based login/registration tied to WhatsApp numbers, with secure session handling.
• Real-time MLBB UID / Server validation and automated diamond delivery once payment clears.
• UPI payment gateway integration; other options such as PayPal, Stripe or Razorpay can remain configurable but disabled unless we decide to switch later.
• An admin panel where I can view and manage users, orders, payment status, and manually intervene if needed.
• Social links/buttons that open WhatsApp chat and Instagram DM for instant support.
• Solid back-end security, database best practices, and clear documentation so I can maintain the system after hand-over.

Acceptance criteria
1. End-to-end purchase completes in under two minutes on a typical 4G mobile connection.
2. Diamonds show up on a test account within the promised time automatically—no manual push.
3. No console errors, SQL injection points, or exposed credentials in a code review.
4. Admin dashboard accurately reflects every transaction state (pending, paid, delivered, failed).

Share any similar recharge or e-commerce work you’ve done so I can see how you handle speed, UX, and payment security. Let’s build something gamers trust from their very first top-up.