eDreams Charged Me €90 for a Membership I Didn't Sign Up For—Refund Requested

I purchased a plane ticket for a friend through eDreams and, naturally, entered the required information like name and surname. To track the reservation and make changes online, I created an account. I bought the ticket, but my friend changed their mind, so I cancelled and received a refund without any issues. However, 10-15 days later, I discovered that eDreams had saved my credit card information and automatically signed me up for an annual membership costing €90—without my consent.

I emailed them multiple times, explaining that I was unaware of this charge and that I would never use their site again, but they refused to refund the €90. It's outrageous that they charged my credit card without notifying me. I demand an immediate refund of the €90 and the cancellation of any unauthorized memberships.