Fraud! They messed up on the flight details so I called to change it they said it already went through so I'd have to call the airline. So I called Frontier and turns out they didn't use the last 4 of my card. What they do (justfly) takes your money then books your flight with one of their company credit cards so their company receives the " frequent flyer miles". That's why when I tried to fix it the airline had the wrong card number. Then just fly wouldn't fixed their own mistake and didn't give me a refund. So I disputed all the charges with my bank and they got me all my money back. $#*! justfly