Complaint Review: Payless Car Rentals Sky Harbor Airport Phoenix

Do NOT rent from Payless Car Rental at Sky Harbor Airport in Phoenix!  I arrived later than planned due to my plane being held up from poor weather.  When I arrived I was informed they had "given" my economy car away and they had no cars left unless I upgraded.  I said, "That's fine, but I booked this on line and you need to honor the price since I already booked ahead."  They refused and I had to pay $167 plus tax MORE for the upgrade.  I had few options left at midnight.  I was temped to go to another car rental place, but I figured they would charge me anyway since I booked on line.   I have had this bad experience from another car rental agency that I will never use again (Hertz).   So I paid the extra and now feel i was ripped off when reading the comments from other unhappy people who rented from them.