I just now was notified of a Frontier flight change of 2 hours and 30 minutes. I selected the option to cancell the entire itinerary for credit. The page advised me I would receive a credit, then I checked and saw that I was in facted booked into the flight that I did not want, no mention of the cancellation for credit. Then I had also tried to use the 50 dollar voucher from a flight cancellation three weeks earlier, and the voucher had been showing as no value from the moment it was issued. Now that vouched showed as having value--.14 cents. The Flyfrontier website appears to be in chaos. FAA complaints may be the only solution , and even that may be futile.