Shopify Store for Selling Robux

I am looking to create an online store on Shopify that sells Robux or digital goods like in-game currency. The store will need to have an automated payment system that delivers Robux instantly or upon confirmation of payment. The key functionalities I need include:

Ecommerce Setup:

Build and customize a Shopify store with a user-friendly, clean design.
Integrate multiple product categories for digital goods (e.g., Robux, game passes, etc.).
Configure a responsive theme that works well on both desktop and mobile devices.
API Integration for Automated Deliveries:

Integrate an API for automatic Robux delivery after successful payment (e.g., using RBXCrate or a similar provider).
Ensure that the system can handle real-time notifications for completed transactions.
Set up webhook integration for automatic processing of orders.
Payment Gateways:

Set up multiple payment methods, including Stripe, PayPal, and local methods like PayU, Wompi, or PSE.
Secure and encrypt all payment processes.
Ensure compatibility with different regions for global customers.
Security Features:

SSL certificate integration for data protection.
Configure Shopify’s in-built security features, plus add extra layers (like 2FA) for admin users.
SEO and Marketing Integration:

SEO optimization to rank the store well on search engines.
Integration of marketing tools like email campaigns, Google Analytics, and social media tracking pixels (e.g., Facebook Pixel).
Performance and Speed Optimization:

Ensure the website is fast, with optimized images and a lightweight theme.
Minimize load times for both product pages and the checkout process.
Post-launch Support:

Provide initial support for bug fixes and minor adjustments.
Create documentation for managing the store and automating processes.
Please let me know your availability, estimated completion time, and cost for the project.