WooCommerce Clisapay Payment Gateway Repair

I need a skilled WordPress & WooCommerce developer to fix and complete the integration of the Clisapay Payment Gateway for my WooCommerce store.

Currently, the plugin is installed, but no payment methods are available at checkout. There may be missing fields or incorrect configurations in the code.

Scope of Work:
✔️ Review and debug the current Clisapay payment gateway plugin.
✔️ Ensure all required fields (Merchant ID, API Key, Callback URL, etc.) are properly implemented.
✔️ Fix any missing settings causing "No Payment Methods Available" error.
✔️ Validate payment data (card details, expiry, CVV) before sending it to the API.
✔️ Implement secure API requests to Clisapay’s endpoint.
✔️ Ensure the callback function correctly updates the order status in WooCommerce.
✔️ Test transactions in sandbox mode before final deployment.

Required Skills:
✅ WordPress Plugin Development
✅ WooCommerce Payment Gateway Integration
✅ PHP, JSON API Requests, and Webhooks
✅ Secure Payment Processing Best Practices

Deliverables:
? A fully functional Clisapay WooCommerce payment gateway plugin.
? No "No Payment Methods Available" issue.
? Proper order status updates after payment.
? Secure API transactions with error handling.