To cancel your subscription, follow these steps:
1- Go to the “My Business” tab > Subscription & Billing
2- Click “Review”: your Chargebee subscription page will open.
3- Select your plan
4- Click “Cancel Subscription”
5- Confirm the action: your subscription cancellation date will be shown.
Booxi recommends exporting your relevant data (e.g. appointments, clients, etc.) before your subscription ends; see here for info.