Toyota Repair Service charged me for "not" fixing the problem?

[Mrs.B]

I took my 95 Toyota Camry into the Toyota Dealership because it had been stalling and acting like it wasn't getting gas or didn't have the power to go. It would crank up but it wouldn't move. I had it towed in to their shop. When I received the first call, the guy said I just needed spark plugs. They changed them, I paid and left in the car. It was still driving a bit sluggish but I thought it would get better as I drove. Eventually, it quit on me again. I called the shop and they had me to get it towed in again. This time he said it was my fuel pump, this problem sounded true, so I bought a fuel pump and had them to change it. I paid and drove off in the car. It still ran a little sluggish but I thought it just needed to get the gas running through the lines again. A couple of days later, I am stranded AGAIN. I was able to drive it a few blocks before it would die on me, so I drove it back to them. They said I had bought a bad fuel pump, so I brought in another, which they charged me to change. I took the car AGAIN and it ran for about a week. I finally got fed up and just never went back to them again. They charged me for "not" fixing the problem. What can I do if anything? Out In The Cold