WORST CAR SERVICE EXPERIENCE EVER!

I recently took my car in to have the Drive Train error checked by servicing as per the warning on the screen. The car was taken in on the Tuesday - 02/06/2015 - and I was told I would get it back the next day and the consultant to contact was Ryan. I was picked up the next day to collect the vehicle but to my surprise was told that Ryan was not in the office to release the vehicle. I then spoke to one of the consultants who then released the car. to me and confirmed i would get an email the next day detailing what was wrong with the vehicle. I was given no feedback regarding what was done to vehicle or signed any documentation as usually done upon collection.. Furthermore, the error still appears and clearly hinders the performance of the vehicle. I am very disappointed and dissatisfied with the service I received. Worst of all, my car is still not properly fixed which I have to put up with and am now weary of bringing it back to this dealership because I might risk being neglected and yet again not get the service I expect and anticipate. An email was sent to the dealership email on the 12th but I have not received any response to date!!!