On Saturday I tried to book return flights from Heathrow to New York. My first attempt ended with the flight no longer being available and directed me to select another flight. My second choice produced the same result. I went back through the selection process only to find that this time there was an error with the website! Frustrating, to say the least. Anyway, I decided to close the page and reload it and went back through the same selection process. This time I managed to get through to the payment section, input my card details and clicked on the Pay Now button only to be told that there was a problem with the booking and my card had not been charged. I had had enough by then so rang instead. The man on the phone took all my details and finally came up with a booking from Heathrow to JFK and back again but the cheapest he could offer was £499 compared to the web price of £442. I decided to go back and try my luck again on your website. Two attempts later I was still getting flights have changed messages so I decided to book from Gatwick instead. This went through! Finally! I paid and waited for the confirmation email only to notice that I had booked to fly out of Gatwick to JFK then return from JFK to Heathrow! I did not notice this when I confirmed this booking so I rang straight away in the hope that I could change it as obviously we wish to return to the same airport where we'll be parking our car! However, your policy states that cancelling or changing, even after just fifteen minutes from booking would result in a fee of £75 per person - £300 for 4 of us! I am keeping the booking and taking the shuttle bus from our return airport to Gatwick at a cost of £52 but I am not happy. As the website had messed up so many times I really don't see why I shouldn't be able to change my flights because I am not entirely convinced it was my mistake. I am usually very diligent about such things, especially as I was spending over £1700 and cannot think how I would have missed this! I have never experienced so many issues when trying to book such a simple thing as flights.If I had my time again then I certainly would not use Travel Up's website and book with British Airways direct. The whole thing has taken the shine off of booking our main family holiday and has left me feeling incredibly stressed. I would normally then vote with my wallet take my business elsewhere but to do so now would cost me dearly so I'm left with no choice.