Coliseum Lexus of Oakland

I traded in my G35 bought a 2007 IS250 from Eric who was a really friendly and a good salesman. I also had them install the XM Radio reciever and the service department was polite and they finished the job a little early (which was nice since I was waiting) However, the Finance Manager was extremely rude and has now made it my personal mission to try and get as many people to stop going there as possible. I traded in my car and told them that I had a car payment that was set up on direct deposit and it was due in a couple weeks, and I was told "no problem". Since I was trading it in, I wouldn't have to worry about this becasue they were going to pay off the car. Well, I didn't put the money in the direct deposit account and I was charged a car payment for the car that I didn't even own anymore and I was charged a $20 overdraft fee by my bank. I called the dealer and they said they were working on paying off my car and they did a couple days later, but when I called back to talk to the Finance Manager, Saehee, she told me it was MY FAULT, which is crazy since I told her the situation, and that I should have kept money in the account, and there is no way they would pay the overdraft fee since it was my mistake. I told her that this is no way to treat a new Lexus owner who planned on taking his car there for all oil changes and service, and that it was just the way that they are handling business that is bothering me... its more principal than the $20. Then she told me that I only bought a Used Lexus, not a New Lexus and she has nothing more to say to me and hung up on me. Overall, it doesn't matter if it is a $1 mistake or a $1000 one, I didn't make it and this dealership should not be treating their customers like this. I will NEVER go back here unless it is to convince some people walking around the lot not to buy a car from her.