Aamco transmission $2500 and a month later East point Georgia

Hello, 
My name is Gauntlett Haynes. I am 61 and retired..
I took my 92 Acura legend in for repair. , in the last week of march 2013. I paid $2500.00 on april 1,2013. When I was called to pick up my vehicle, I did so. My car was running worst than before. I took the car back immediately . Now the Acura has been there every dice then. I've called and faxed AirTran, Barclay bank. I used my card to pay for the repair bill. I've requested a refund. I've call Aamco several times. I want my money back. Aamco told me that now they would fix the car for a third time. I was told by Aamco east point my car would be ready  two weeks ago. still i have not had my auto. They have had my car over a month. this does not make any sense. Really! I google Aamco information, wow, they have a rating of "F" wow. Please help me. I've called the police department, for information. I can't believe this is going on. This is bad business, and dishonest .

Gauntlett Haynes