Why was I punished by easyJet for someone else’s crime?

Tha airline blacklisted me because a fraudster made payments for flights with my card four years agoIn June 2014 I reported to my bank fraudulent use on my credit card, which, among other things, related to £2,000-worth of dental treatment and flights purchased with Ryanair and easyJet. This money was immediately refunded to my card and, to this date, my card remains in use without any problems. Since then, I have bought and used Ryanair flights without any issue. But I have recently tried