MyTrip Online Charged High Fee Without Consent After €1 Check In

I used the website check-in.my-trip-online.com to complete the check-in process for a flight ticket I had already purchased from Hisky. I was aware that I would be charged €1 for the check-in service. However, on June 27, approximately $125 was charged from my account without my knowledge or consent.

I demand that the full amount be refunded to my account immediately. Otherwise, I clearly state that I will initiate legal action. I am filing this complaint due to both the unauthorized charge and the failure to refund the amount.