That's a pity that you want to cancel your subscription.
In the following links is described how you can cancel your subscription depending on the platform! This is possible at any time, you can also deactivate the automatic renewal!
iOS: https://support.apple.com/en-en/HT202039
Android: https://support.google.com/googleplay/answer/2476088?hl=en
If you need help, feel free to contact help@kickbase.com