Duolingo complaint: One year duolingo

I was charged 55€ for one year of Duolingo without any notice… and when I tried to talk to them,

What I said in the email:

I tried super duolingo in the summer and it seems the trial period ended and without any warning i was charged 55€…(or at least receive my Money back without the Money of the almost 2 months that passed, that i did not notice that this happend…)

Their response to this was:
You are welcome to cancel the subscription, however, we are unable to provide a refund for you due to the subscription age and usage. So sorry for that!

And they annexed 2 photos to that, the first being the one that shows that I have (even tho I did not want it…) the one year plan and the second that I had a 49day streak, yes I had a streak, but they forgot to mention that I stoped the streak as soon as I noticed I was charged (robed) of 55€…

This is just sad, being tricked by what is supposed to be a learning app…