Booking.com Unauthorized Use of Credit Card Information

I hope someone from Booking.com sees this. It seems impossible to get assistance beyond the usual FAQ provided in the help section of their website. On October 20, 2024, at 23:54:07 (GMT-4), there was an attempt by Booking.com to charge £1219.06 to my credit card. Fortunately, my credit card company declined the transaction. I do not know this charge and would like to report what appears to be unauthorized use of my credit card information. Please advise on how I can proceed with resolving this issue. My contact details are: K*** L***, Email: ken*****@gmail.com.