IOS – How to report competing app which has bypassed In-App-Purchase and started using third party payment processor

late but may be useful for new people

• for unlocking features/content you shall use in-app purchase
• for products/consumables (that not implies the previous item) you can use external payments like Stripe
• if you want to avoid in-app purchase, you can do the netflix way, give the app without register/guest, just login with an account previously purchased in the web or android device. But for this your app should have a known brand, otherwise no one will go to your web, make a purchase, come back to your app and login.

source: https://developer.apple.com/app-store/review/guidelines/#payments

With Apple subscriptions, you can either cancel them and let the balance play out or if it just renewed, sometimes you can undo the payment.

Apple took the money, so cancel with them. When that is sorted and you are outside the coverage of your last subscription, you will have a chance to start a new subscription type. There is no “change” lanes in my experience when one app has different tiers of subscriptions.

Assuming you cancelled, perhaps there is a period when it’s still active so a chat with Apple support about your specific purchase would be the next escalation if needed. My guess is linked in might only sell basic outside the store, so they might not want to say that directly. I don’t see the words Basic, but maybe the metadata is too long to easily navigate from the in app purchase summary page.