To cancel your 3-day free trial subscription on your Android device, you need to do it directly from Google Play.
Step 1: Navigate to the Plan&Billing tab.
Step 2: Choose Manage subscription.
This will take you to your Google Play-Subscriptions overview.
From there, tap your Bluedot-subscription, and cancel.
That's it. We hope to see you back to Bluedot soon. 🔵