Firstly, sorry to see you go!
You can cancel your Fabrik subscription at anytime, you are not tied into any long term contract. Your subscription will last till the end of your current period and then cancel or if you are on trial it will cancel instantly.
To cancel simply go to your account by clicking your name top right.
Once in the Manage your Account area under the Subscription tab open the Manage Stripe Billing
In there you will find the option to Cancel your plan
Sorry to see you go, you never know we might see you again.