Punished for a company's Faulty Website!!!!!!

I wanted to book flights for me and my family on Flight Centre's online booking as they were the cheapest. After numerous attempts of trying to book, and receiving errors after I already entered my credit card details. I booked with another company and the booking was successful after the first attempt with no hassle at all. After the booking was made with the second company, an email came through that a booking was completed at Flight centre. I phoned The online booking centre and spoke to a Lady " Jody". I explained what had happened to her, she confirmed that they could see the errors and that they could see the numerous booking attempts. She asked if she could phone me back, she just wanted to find out what the procedure was going to be. After a while Jody phoned me and said that i had to cancel with the second company as their booking was made first. I then asked to speak to a manager as i was very upset that i had to cancel with the second company after i could make a booking with Flight centre and without my knowledge a booking was "completed". Jennifer the Online operations leader phoned me back. I explained what had happened to her and she also confirmed that they could see on their system the errors and numerous attempts of booking that failed. I emailed the evidence of my second booking to her because she was going to speak to head office to refund me as the money was already deducted of of my credit card. After phoning for a week and trying to follow up with Jennifer, I've been given excuses that she could not speak to me at the moment and no phone calls have been returned. Both bookings (flight centre & Second company) have been deducted from my credit card. How is it fair that i have to pay for a company's website problems. I want my refund please!!!