Unexpected charge on my credit card. Please stop.

Dear manager,

The problem started in June 17th.
I had to edit the PDF in a hurry that day, so I applied for the trial version with my personal ID (personal information removed by moderator) and used it without knowing that UPENN supports Acrobat pro. (Perhaps I also entered my credit card information at this time.)
Then another lab colleague advised me to go through the process and try it using my Penn ID because UPENN supports Acrobat pro DC.
After hearing that, I searched the internet to find a way to apply my Penn ID.
When I applied and logged in again using my Penn ID, it seemed to be used normally under the UPENN support.
However, a week later, my credit card was charged for Acrobat trial use, and today, another month has passed.
So, I logged out of my Penn ID and newly logged in with my gmail ID and tried to cancel my subscription if a subscription was applied, but I could not find any subscription request.
Since I changed my login to my Penn ID on the night of June 17th, I have never used Acrobat pro DC with my gmail ID.
(In other words, after the free trial period, which was supposed to be applied, I have never used a gmail account.)
Please help me no longer get Adobe-related charges to my credit card.
Also, help me get my money back for Adobe pro DC, which has been billed and paid twice. (June 26th, July 25th)

If you need to share my credit card information, I will.