Why did I get charged a fee when I cancelled within a half hour to an hour of subscribing?

I subscribed to an Adobe Acrobat Pro free trial and cancelled within 30 minutes to an hour of subscribing and was charged a fee on $32.20 USD on September 9th, 2026. Why was I charged a fee and how do I get reimbursed? More Details: 

Invoice Number: 3574266023, Date: 08-SEP-2026, Order Number: 7278719400, Customer Number: 1282309047 Purchase Order number:  AB08472016922CUS