Hello Melanie

If you bought this exact product, you were sent the wrong version, as the QWERTZ version (CH layout) is linked here. However, I can't find any other version in the Digitec Store.

I would contact Digitec directly so that the keyboard can be exchanged.

If the keyboard has QWERTY keys but a Y appears when you press the Z, you need to check the keyboard settings on the iPad: Settings - General - Keyboard - Keyboards and it should say "German(Switzerland)". You can click on it and check that QWERTY is really selected. If German(Switzerland) is not there at all, simply add a new keyboard via "Add keyboard..." and delete the wrong keyboard via "Edit" at the top right.