Hi @estefani_sara,
Hope you are doing well. Sorry for your experience with Acrobat Reader Mobile.
I checked your account registered with the community and saw that the subscription is still active on your account.
The best suggestion here would be to check with Apple on the cancellation of the subscription.
To learn more about cancellation, please click here: Manage subscriptions — Acrobat for iOS Help (https://adobe.ly/3HCVuWT)
Also, to start the refund process, please visit the link below from Apple:
Report a Problem (https://adobe.ly/3HJQzmN)
Hope this helps.