If you have purchased a subscription via iOS, you need to cancel it via the app store on your phone or iPad. We at BostadsPortal cannot cancel subscriptions purchased via the app store.
You can follow this guide if you are unsure how to cancel your subscription: https://support.apple.com/en-us/HT202039
If you have cancelled it via the app store, please note that, per apple's cancellation policy, your subscription is renewed 24 hours before the renewal date.