Configuring Razorpay Gateway with WHMCS

Razorpay gateway is already configured with our WHMCS, but with plugin. Problems: [login to view URL] number not getting there properly when going for payment, we need to manually update with country code. 2. Payment successful is appearing and the invoice will be still marked as unpaid. 3. Payment capture not working from WHMCS. (renewal should work with the same card or payment method they used) 4. Refund from WHMCS. 5. Due to invoice still showing unpaid, it is allowing the customer to try again for payment and getting with multiple payment for one invoice and forced to refund, need restriction on this to not to get charged to customer if paid once. Summary : It should be able to handle with same what we manage from payment gateway.