Refund

@niket_3005 A refund depends on when you cancel and the type of subscription you tried. Now, if you are a past user have used a trial versions and then cancel it, the company may not cancel it and charge you for the app. For most plans, you get a full refund if you cancel within 14 days of your initial purchase. Learn if you get a refund when you cancel. Because this post is from Acrobat Scan, this would mean you may have made the purchase on your mobile device may it be Google Play Store or Apple App store, you need to contact thm directly. Adobe does not hav access to your accounts and billings. 

Here’s how to cancel based on your subscription type:

On Android: Use our automated cancellation form to submit your request. It only takes a few moments.
On iOS (iPhone or iPad): To cancel your subscription, follow the instructions outlined in the help article.

https://community.adobe.com/t5/adobe-scan-discussions/how-to-cancel-acrobat-mobile-or-scan-premium-subscriptions/td-p/15427706