Your Purchase Could Not Be Completed - For assistance, contact iTunes Support a...

n-App Purchases - 'Your Purchase Could Not Be Completed - For assistance, contact iTunes Support at www.apple.com/support/itunes/ww/.' being displayed.

I try to purchased the game display in the picture below but it didn't word out, However my other game like Pubg Mobile successfully completed the purchase! Can you fix this issue for me?

Thanks