Why am I unable to pay online? It says, "You are not authorized".

If you are a reseller under MSG91, it is compulsory for you to make the payment through MSG91 website. You cannot make the payment via your own website.

The payment gateways for MSG91 are integrated on our website only and therefore you need to make payment through our website itself. You can login to your account on our website by following the link-  https://msg91.com/signin and make your payment by our panel.