eDreams complaint: Cancellation of flight

I am a student and I wanted to purchase a ticket for an internship. It was an American Airlines ticket to Philadelphia. eDreams charged my 70€ more for cancellation and insurance. I had to cancel the flight due to the change of my internship date and only that they told me that because it’s American Airlines I can’t get any refund which is really disturbing when I paid extra to be able to cancel and get at least partial refund.
Also the insurance that they named do not cover anything.
I called eDreams couple of times and every time they made me sure that this case will be looked into and I have to right to have a minimum refund but I never heard anything back after the call and they were only nice on the phone to get the full star evaluation costumer service by the end of the call.
This is really unfair that this company make people pay extra for refund on a non refundable ticket!
Booking reference : 11051689666