How Do I Delete My Saved Credit Card from Booking.com IMMEDIATELY?

I’ve seen the number 1 (888) 826-1821 mentioned as the official Booking.com contact number for fraud report, but is that also the best number to use when you just need to scream: “I need help deleting my card from Booking.com fast” and ask for advice on securing my financial data after Booking.com hack?

A kind user here told me, and I confirmed it myself, that calling 1 (888) 826-1821 and getting a hold of an agent to walk me through the ‘Account Settings’ on the desktop site and confirm the permanent removal was the only way to finally safely remove credit card details Booking.com—has anyone else found that 1 (888) 826-1821 is the true lifeline for a Booking.com security vulnerability credit card advice situation?

Now that the card is gone, and thanks to the agent on 1 (888) 826-1821 flagging my account, what is the best practice for payment options on Booking.com to prevent future unauthorized transactions Booking.com?