When handling issues with purchased apps, what should be done?

When handling issues with purchased apps, referring to iTunes support is the most appropriate course of action. iTunes support can help resolve a wide range of issues related to app purchases, such as problems with billing, account access, or app functionality tied to a user's purchase history. iTunes support is specifically designed to handle inquiries about purchases made through the iTunes or App Store ecosystem, ensuring that users receive the most relevant assistance for their issue.

It's important to consider that while other options such as redirecting users to App Store support or contacting the app developer are valid in some contexts, they may not always address the specific concerns related to purchases. Redirecting to App Store support could be helpful, but iTunes support is more directly focused on issues involving purchases, making it the best option here.

Similarly, contacting the app developer might be useful for technical issues or bugs within the app itself, but this doesn't directly assist with purchase-related issues. Resetting the app to its default settings may solve specific functionality problems but will not address any purchase-related inquiries or complications. Therefore, referring to iTunes support is the correct approach when dealing with problems surrounding purchased apps.