The game Merge dragons won’t allow me to buy gems

Hello joy-ellen,

Thank you for using Apple Support Communities! I understand that you are unable to make an in-app purchase. If the purchase is being declined, the following support article provides some troubleshooting steps to take next:

If your payment method is declined, or you have a billing issue with a previous purchase in the iTunes Store - Apple Support

You'll want to be sure to use an updated payment method, and that your name and billing address matches what is on file with your financial institution. Consider also trying a different payment method, or contact your financial institution if the purchase is declined after following those steps.

Take care.