It's very important to keep a track of all your customers based on the plan they are opting for. Here are the quick steps for the same:
Firstly search for the plan you want the subscribers details for on the Recurpay dashboard.
Go to the Recurpay dashboard under subscriptions and click on the export option on the top right of your screen.
With the data, there are a little tweeks with filters that you need to do. i.e search for the plan id you want to derive the data for. Sample attached for reference.
There you go, here is the list of the subscribers associated with the plan id.