I have an application intended to be published over Nokia Store, when submitted for QA they answered with solution to publish app by adding functionality to charge user for service through Nokia.

Now in detail what my app does is on start it checks whether user is active or not? (currently this application is provided by a service provider in my country) after confirming user is charged via Service Provider, while nokia said "We should develop functionality to charge user via NOKIA" now I don't know how do I implement it? Any help?