Suburban Transmissions

This is going to be a long one and I am going to try and remember everything that happened to my car to the best of my abiility.
At first I experienced a popping noise when the car was shifting into reverse. I took it to get fixed, then it Overheated when I was sitting in traffic one day. I was told it could be the Temperature Sensor, but if I recall what happened correctly I ended up getting a new PCM (I had my cousin do it because I knew I would get charged). Then my car had issues going into Overdrive; again I took it to the shop. At first I was told it was something electrical. I was then told to change the O2 Sensor (I would have been charged $ 90 by the shop supposedly labor was free, but my cousin charged me $ 45 including labor). Later on after going to the shop for a third or fourth time, I was advised to change the Temperature Sensor as my car was still having problems slipping while I was driving. My car got taken to M&B Automotive, another company that Suburban gives business to and I became another $ 245 in the hole. After this repair, I was still experiencing problems driving it on the highway at speeds over 55MPH; again I went to the shop. I am now told I need to replace the Valve Body and the Neutral Safety Switch (no price quoted, but I am sure there is one to come). I have been experiencing problems with my Transmission since April 2010 and have taken it to the shop (my car is under warranty) about six times. I have been nickled and dimed along the way adding up to at least $ 600 (not icluding the two new parts they say I need to have replaced). IT HAS NOW BEEN ALMOST FOUR MONTHS!!! I am sick of spending Saturdays at Suburban Transmissions. Their new Summer Hours have them leaving at 4PM on Weekdays and Noon on Saturdays. They have had my car since Saturday; it is now Wednesday. Last time I was at the shop they had it a whole week as well. I need my car to get to work. This whole situation is a pain. Currently there is around 40 cars on Suburban’s lot all of which they don’t have parking space for, let alone the manpower to do it all in a speedy manner so they had a faster turnaround. I don’t see them getting anywhere fast with the dishonest business they are running.
I was told by the company to remove this posting, which only made me more upset. .. so I just added my complete story.
Thanks for reading.