Cannot purchase diamond in game

Hello there, vivian95.

It sounds like you're having issues with making an in-app purchase on your iOS device, due to not being able to connect to iTunes. The following Knowledge Base article offers up some great initial steps for troubleshooting connectivity to the iTunes Store:

Can't connect to the iTunes Store - Apple Support

In particular, these steps are relevant:

Before you begin

1. Make sure that you can access the Internet on your computer or device.
2. Make sure that your computer meets the iTunes minimum system requirements.
3. Make sure that your operating system is up to date:
   Mac: From the menu bar at the top of your computer screen, choose Apple () > Software Update to see if updates are available for your computer.
   Windows: Go to Microsoft's Windows Update webpage.

Fix issues on your iOS device

If you can't connect to the iTunes Store on your iPhone, iPad, or iPod touch:

1. Make sure that your date, time, and time zone are correct. Tap Settings > General > Date & Time.
   Time Zone might list another city in your time zone.
2. Make sure that your iOS software is up to date. Tap Settings > General > Software Update or connect your iOS device to iTunes and click Check for Updateon your device's Summary page.
3. Check and verify that you're in range of a Wi-Fi router or base station. If you're using cellular service, make sure that cellular data is turned on from Settings > Cellular.
   If you're connected to cellular data, larger items might not download. You might need to connect to Wi-Fi to download apps, videos, and podcasts.
4. Make sure that you have an active Internet connection. Check your device's user guide for help with Internet connection.
5. Check to see if other devices, such as portable computers, are able to connect to the Wi-Fi network and access the Internet.
6. Reset (turn off and then on again) your Wi-Fi router.

If there's still an issue, learn what to do if your device won't connect to a Wi-Fi network.

You can also reach out to the app developer, to determine if the issue is more application specific using this article:

If you don’t see your in-app purchases - Apple Support

iOS apps

You can contact an iOS app developer using your computer or iOS device.

Follow these steps on your Mac or PC:

1. Open iTunes.
2. Go to the iTunes Store.
3. Search for the app.
4. Click the app.
5. Click Ratings & Reviews.
6. Click the App Support button under Customer Reviews.
   

Follow these steps on your iPhone, iPad, or iPod touch:

1. Open the App Store.
2. Search for the app or find it in Purchased.
3. Tap the app.
4. Tap Reviews.
5. Tap the app's support link under App Store Ratings.
   

Get more help

• If you can't make an in-app purchase, try updating your payment information.
• Learn how to turn off or require a password for in-app purchases.
• For more help, contact iTunes support.

Thanks for reaching out to Apple Support Communities.

Kind Regards,

Pedro.