I love Synthesia and I've already purchase it for PC and Mac. I'd love to use it on my iPad, but I just can't unlock the full version.
Every time I tap "Unlock now for only 8,99€", I receive the error message:
And then the window shows:Your purchase could not be completed
For assistance, contact iTunes Support at http://www.apple.com/support/itunes/ww/
I've already called the Apple support two times and talked to them for over an hour.There was a problem purchasing or restoring.
(Leave this screen and return to try again.)
Did someone have a similar issue? Is there maybe a problem with the app?
I'm using an iPad 9,7 (2018) with iOS 11.4.