A few hours before my family and I were leaving Nottingham for a Gatwick flight only to Antigua we were sent an email to say that we hadn't paid??? When the flight had initially been booked over a year ago, cancelled the first time by BA themselves and moved on to 23 October 2021, receiving email confirmations from BA...constantly being updated on change of flight times throughout the year. We all know flights are paid up front....With hours to spare, and no supervisors to take ownership of the call or us to show confirmation email trails, we were all stressed, and so not wanting to loose the separate accommodation taxis we paid for etc we relunctly paid the flight money again, advising we'd address the issue on our return....As soon as we returned home, we tried to contact BA to get the second payment refunded, again no one wanting to take responsibility to look through the audit trail. My partner and business partners use BA constantly throughout the year...we will not be using them again. Several phone calls and emails and a stressful start to holiday ..I am disgusted.