Wright Buick GMC

In 2013, I took my car to Wright Pontiac while it was still under warranty, because when I clicked lock/unlock on my key fob, the driver's side door did not lock or unlock. As soon as I took my car out of Wright Pontiac's service department, I turned off my car to test it, and surprisingly, nothing was fixed. I went back inside to explain the issue and they told me they would need to order a new part and bring my car in on another day to get it fixed. This is a bit inconvenient, as it is not as simple as taking my car there for an appointment. I work during the day and I would need to drop my car off overnight, get picked up by my parents and borrow one of their cars. I never got around to taking my car back in to get this fixed until a week ago, when I took it in for a recall appointment. I asked if they could take a look at and fix the driver's side lock, and got a call from the service department. They explained it would be $280+ to fix, and I declined this for a few reasons, the first being (1) I will just use my key to manually unlock the door and (2) I am going to have to pay $280 to get something fixed that SHOULD have been fixed while my car was under warranty. I found this a little ridiculous, but the most ridiculous part was that when I picked up my car, I was charged $51 for ‘diagnostics'. I couldn't believe this, because I had previously taken my car to this specific dealership to get fixed while under warranty, they did NOT fix the issue at that time. In their computer system, they should have already known that the ‘electrical failure of the left door acctuator' was causing this issue and there is no way I should have been charged $51 for their ERROR. Needless to say, I will never be using this dealership in the future for service or the purchase of a new vehicle. My question to you, is it worth it to lose a customer over $51 due to an ERROR on your companies behalf?