Hi there,
Hope you doing well, It's my pleasure to helps you.
Gone through your project, you are asking to integrate the module on WordPress site for your paid subscription users who can access your premium content.
What I analyze to see your site AmanPay its digital wallet site and you want to make/have a WordPress site to integrate with that, so your monthly paid subscription users can access/download your premium content from there.
Form 2008 years we are in web development/designing and so I am accustomed to working with all sorts of products and services, and in a variety of industries.
Please, let me know if there anything for which I would help you to make your strong presence digitally.
Thank you for your consideration.