Membership Iphone app(using wordpress system)

Hello I have ready my wordpress system, I need app to connect and configure the app to memberships system with api sales. 3. 1.1 Business: Payments - In-App Purchase Guideline 3.1.1 - Business - Payments - In-App Purchase We noticed that your app offers a subscription with a mechanism other than the in-app purchase API. Please see attached screenshots for details. Next Steps To resolve this issue, please revise your app to ensure that the subscription for products used within the app is offered using the in-app purchase API, with the exception of the content specified in guideline 3.1.3 of the App Store Review Guidelines. In-App Purchase It may be appropriate to revise your app to use the in-app purchase API to provide content purchasing functionality. In-app purchase provides several benefits, including: - The flexibility to support a variety of business models. - Impacting your app ranking by consolidating your sales to one app rather than distributing them across multiple apps. - An effective marketing vehicle to drive additional sales of new content. For information on in-app purchase, please refer to the following documentation: In-App Purchase for Developers In-App Purchase Programming Guide For step-by-step instructions on in-app purchase creation within iTunes Connect, refer to In-App Purchase for Developers. Request a phone call from App Review At your request, we can arrange for an Apple Representative to call you within the next three to five business days to discuss your App Review issue. To request a call and ensure we have accurate contact information, reply directly to this message with a contact name and direct phone number to reach you. On occasion, there may be apps on the App Store that don't appear to be in compliance with the App Store Review Guidelines. We work hard to ensure that the apps on the App Store are in compliance, and we try to identify any apps currently on the App Store that may not be. It takes time to identify these occurrences, but another app being out of compliance is not a reason for your app to be.