After NUMEROUS emails and text messages, I was tol...

After NUMEROUS emails and text messages, I was told that I was indeed approved and ready to go. I live 4 hours away, so I explained that I cant afford to waste time and gas to go there if it isnt a for sure thing. I get there and NOTHING has been done. Not a thing. Come to find out that I needed a cosigner and all that. I waited FOUR HOURS in the lobby waiting for the salesman to come back. Not a peep. After saying I wasnt approved for that first vehicle, my salesperson goes off and tries to sell me on a COMPLETELY different vehicle, that has NO correlation, and has nothing that fits my needs. Then after, tried to sell is a similar car that wasnt listed yet, have yet to hear back.
Going from a definite yes to a NO, only to receive a half tank of gas for compensation...? Even after explaining that I'm not going there for nothing.
Edit: I understand the salespeople can only relay what the managers tell them, but they really need to follow up with them and coordinate, since I wasted 12 hours of my only day off just to go home empty handed. I was basically lied to. Not sure id like to go back to them.