Android phones / tablets:
Please use the following link for Android phones:
http://play.google.com/store/account/subscriptions
Apple / iOs:
You can cancel your subscription directly in the Apple system. Just use the following link:
https://buy.itunes.apple.com/WebObjects/MZFinance.woa/wa/manageSubscriptions
Huawei phones:
If you subscribed via Huawei AppGallery, please tap on this link for cancellation instructions: