First of all, we're very sorry to see you go. We hope you'll drop us a line and let us know how we can make the membership more valuable to you in the future.
If you purchased your membership on playmagnus.com:
Go to https://www.playmagnus.com/en/account/membership and click "Cancel".
If you purchased your membership on an iPhone or iPad:
Subscriptions, like our membership, is handled through iTunes and App Store. Please follow Apple's own guide for how to cancel your subscription:
https://support.apple.com/en-us/HT202039#iOS
If you purchased your membership on an Android phone or tablet:
Subscriptions, like our membership, is handled through Google Play Store. Please follow Google's own guide for how to cancel your subscription: