thunderbolt transmission have had my car way to long. Houston Texas

it started off fine. they were very nice and informing. but that was about all the good I can say. my sales person name was cody. I have nothing bad to say about him. they said it would be 15days before they could look at the motor and that was fine. well after 20 days they said it would be done. well I call them and they say well we have some small things to take care of and it would be the next day that my car would be ready. well needless to say 40 days later it still wasnt ready. I called them just about evey day after that. they keep giving m  the run around on my car. well I got.the car back and by the time I got home all the check engine lights were on and a new rench light. I took it back in. well I call them back a couple days later and they say my transmission is going out. I have never had a transmission problem on the car. not one problem but 5 things. its funny that it has a problem only when I take it to get fixed at a transmission shop. its been 2months and I still cannot get a answer on my car. what was quoted at 1800$ turned into 5000$. I have no ride to work  what is the deal guys