I've been flying on Frontier Airlines for almost a decade now, and up until the past two months I've had nothing but good experiences. Really. And at over 200k miles flown per year for the last couple of years, that's saying something.

Right now, I'm at wits end trying to get Frontier to fix my Early Returns account on their system so that I can book a flight. I log in to the Frontier website with my Early Returns number, like I have for years, go through the process of selecting the flight, seats, etc, and get to the point where I hit the final button to purchase my ticket and I get the error:

"We could not book your itinerary at this time. No payment has been taken. Either attempt to purchase again or start a new search. Your frequent flyer membership number is not recognized. Please correct the information before proceeding."

And I'm logged in under my Early Returns number!! (It appears in the page header right above the error message).

This has been going on for two months (five trips booked), and each time I have to make the reservation over the phone (they have no problems), then ask to talk to a supervisor to beg them to fix my account, and to get back to me to tell me it's fixed. I follow up with an email each time to customer service (with an image of the page with the error message on it).

Nada. No response. No fix.

I'm at a loss. Does anyone know how to get the Frontier technical support folks to fix a customer problem?