My corvette is being worked on for the 6th time sa...

My corvette is being worked on for the 6th time same issue. I was told by the service manager that parts are obsolete for an 05 it's an old car and I had inherited this problem. Drove car fine for 3 1/2 years. The first time the mechanic replaced a door module he damaged the weather strip on top of door and replaced a water pump and left barely put the hose back on. I told Don and he said thanks for telling me and walked off. I talked to Tripp after the sane issue arose again "service column lock"and he assured me to bring it back and it'll be fixed. I reluctantly did and a new column and steering column lock module replaced only to be told both new parts were defective. I contacted General Motors to file a complaint as I feel a lack of quality and knowledge in which I'm sure there is support for this issue. Never going back or buying my new vehicle from galles next year.