If you purchased your subscription via the Google Play Store and you paid with Google Wallet, you can only disable auto-renewal through your Google Play account. The process is as follows:
1. Go to My Account in der Zattoo App.
2. Choose your HiQ subscription.
3. Click Change.
4. You will be automatically redirected to your Google Play account where you can cancel your subscription.
5. Confirm cancellation.
Alternatively, you can also deactivate this directly in your Google Play Store account:
1. Open the Google Play Store.
2. Go to Apps & Games.
3. Go to My Apps & Games.
4. Under installed you can find Zattoo, this is where you can also cancel the subscription.