Avis/budget rent a car Ripped off by Rental lady claiming additional days after car has been returned on time. Houston, Texas

 On 12/14/12 I made a reservation on my pc for a two day rental to pick up at 1pm at Nw freeway location. A ugly caucasion lady told me that when we came in at 1 " you get a free upgrade cause we dont have the car you wanted ".  After the credit card I had and my wife's didnt pass for the rental. We left to go get my dad. Elbert Easter Jr.   When we got back to store the white lady said "We only have a white Corolla '. I said we will take it. She walked us out too car . And we was given a single key ring with 2 keys on a secure ring made of metal. We left the office at 330pm friday 12/14/12. I called the coporate office on Sunday @11am to confirm the 24 hour rental return time.  I spoke with latin lady Susan . she said " leave the vehicle in the lot if the store is closed . And I parked the car exactly where we took the tour on friday with the white manager . We put the keys under the driver side mat and left the locked vehicle.   The white manager called me this morning 12/14/12 @11am " Mr. Easter are you going to bring the car back". she claims the car has been gone for a month. I told her the car is in front of her store. She "says where is the keys" . I said under the driver side floor mat , where its been since Sunday. Manager says "you owe us for a months rental. I called the Corporate office and they had no record of my conversation on 12/15/12. This company is a piece of shit . I worked for a rental company and this place has a devious and deceptive process. Please be aware ......................