Possible CSC failure. NEED ADVICE ASAP

mastatikle

I bought my 2009 sport Z in late May and on the 2nd day of having it the clutch pedal stuck to the floor and I was able to prop it up with my foot and brought it straight to the dealer. Dealer replicated problem and agreed to have a shop they use fix it. I drove it easy for a month after being dicked around by the shop with them saying "the parts on back order" until the pedal stuck to the floor and I couldn't get it up at all. Luckily I was a mile from my house and got it home and then towed to shop, apparently those "back ordered" parts magically appeared the next day and the car was fixed (Aug 21). The shop insisted on the fact that it was the master cylinder. They swapped it out and it has been driving as it should until tonight when I was pulling onto the highway and I felt the same soft clutch pedal feeling and instantly my gut clenched up. I struggled off the highway and got it home having to run lights and stuck in 1st. It is currently in front of my house and I'm not sure what I should do. Should I go back to repair shop and bitch at them for not fixing it (is there a warranty)? Should I get my lawyer involved or wait for that? I do not feel as though I am responsible for this since their "fix" only lasted 3 1/2 months. I am out of the 60 day period with the used dealer so I can't really go after them and when this happened last time they just told me to go to shop which I did. Any advice is greatly appreciated.