Budget Rent a Car Sleazy charges, even crappier service! Las Vegas, Nevada

Thought I would save a few bucks and rented a car from Budget, instead of my usual rental company, for a recent trip to Vegas.  What a mistake!  First they gave me the wrong car.  You don't find this out until you are exiting the garage and then the guy at the gate tells me I have to go back to the rental office and get them to straighten it out.  Back at the rental office the staff didn't much care that I was in a hurry or that they had made a mistake.  I waited over 15 more minutes while they straightened out their mistake.  Not a "sorry for the mistake"... nor a "sorry about the delay"... nothing!  When I finally received another car (which by the way had a very dirty interior!) they neglected to ask me for the keys back from the original car and as I was in an even bigger hurry I inadvertently took them with me.  When I returned the car at the end of my trip I left both sets of keys in the car.  My bill however was about double what the contract price was.  So, I went to the counter to try and get the charge changed but the unhelpful clerk was simply intent on wasting my time - knowing that my flight was leaving soon and I'd have to give up.  The clerk was most unhelpful and disappeared in the back for 10 minutes to "speak to a manager".  Despite my pleas to get it resolved I ended up having to leave to catch my flight.  I'm now awaiting a full credit and an apology from the company.  From the other reports about Budget ripping off customers and my own experience I'm certainly not happy with this company!