Hello, Me and my girlfriend have booked a holiday to Egypt, and decided to book seats together for the flight (£34) After entering the payment details, the money was held in my account (I.E if my balance is £64, my available balance will be only £30).
We then received a confirmation E-mail stating the following:

Select your Seat
Thank you for reserving your seats. You'll be able to reserve your seat numbers from tomorrow at no further charge. Simply click on the link below at least three days before your flight departure and follow the instructions to choose your preferred seats.

However, when we proceed to select our seats, it then says we have an outstanding amount of £34 to pay for the seating? Im a little confused as to what to do, as I'm apprehensive to put my details in again, in case in charged yet again for something i have already paid for? Just wondered if you had any advise for me?
Thanks
Bobby