I cancelled my free trial within the free trial but still got charged for two months now

Hi, 

in January I started a 5-day free trial for Adobe Acrobat which I cancelled within the free trial. I even got a cancelling confirmation. Now I see that I still got charged 7,98 €/month twice. I saw my account had AI for Adobe Acrobat subscribed, even though I never subscribed to it. I cancelled the subscription but I also want a refund over those 15,96 €.

Thank you!