In app purchasing
When i want to buy in app a msg just showed says “Your Purchase Could Not
Be Completed
For assistance, contact iTunes Support“
iPad Pro, iOS 12
If you haven't already done as instructed and contacted iTunes Support you should do so (these are user forums, not iTunes Support) :
- go to http://www.apple.com/support/itunes/ww
- click on your country's flag (the country where you live, and which is therefore the country on your account)
- click on Contact Support towards the top right
- click on Get Help under 'Talk To Us'