Minecraft can't be updated, what should I do?

I wanted to play Minecraft PE on my iPhone today. With my brother. On-line. But that didn't work because I had to update Minecraft first. But when I hit "update" it didn't work.

Can anyone help me?

I also screened the whole thing

It is clearly in the error message.

Are you signed in with a different Apple account than the one you used to buy MC: PE?

It is clearly on it.

Check your Apple balance to see if you've got any money back. If so, MC has been refunded and you will have to buy it again. Or you bought it with a different Apple ID

Thanks and where can I see that?

But I don't understand it

Tap on "Today" in the lower left corner and then on the blue figure in the upper right corner and you will see the credit immediately

It is clearly in the message XD…

Then if the purchase was refunded as it says there or you bought mc with a different Apple ID?!