I contacted the Samsung store to refund and cancel my subscription and they said I had to reach out to Adobe support to receive a refund. I am a low income individual and $92 CAD is enough to leave me without any food for the rest of the month. I am DESPERATE. I did NOT recieve any email warning me my free trial was ending as I was promised on my end, and I only activated the free trial out of desperation because I needed to sign an important contract for my work and my computer was being repaired. I will NEVER have further use for a whopping year long subscription. I already used up my 48 hour time gap trying to contact Samsung for a refund only to be told to reach out to Adobe. I have autism and ADHD, so I only activated the subscription willingly with the knowledge I would be reminded, this is deceitful.
I hope you are doing well. I am sorry for your experience with Acrobat Reader Mobile.
Since Acrobat Premium is a mobile-based subscription, I suggest you contact the store from where you purchased the subscription.
You may refer to the below links for more.
Our help article to learn more: Subscription Services — Acrobat for Android Help (adobe.com)
Initiate refund from the store: Request a refund on Google Play - Google Play Help
Our help article to learn more: Manage subscriptions — Acrobat for iOS Help (adobe.com)
Initiate refund from the store: Request a refund for apps or content you bought from Apple - Apple Support.
Let me know if this helps.