Regarding refund

Hello Soumya,

Hope you are doing well. I am sorry for the experience you had with billing on our application.

However, the billing and transactions for Adobe's mobile based subscription are handled by the store through which you have purchased the subscription. 

I would suggest you to get in touch with the respective store depending upon the device you use [ Android / iOS ] to get a better resolution on this.

To know more, please click the below links-

For iOS:Manage Subscriptions — Acrobat for iOS Help (adobe.com)

For Android: Subscription Services — Acrobat for Android Help (adobe.com)

Let me know if this helps.

Thanks,

Souvik.