Sears Auto Center

I had an oil change service for my Nissan here which was quick and satisfactory. I requested them to replace drain plug with a mechanical drain plug (with spacer) that I bought online. I was happy as they agreed to do so without additional charges but finally disappointed me by returning the plug stating that it was loose. Later I investigated that mechanic did not use the spacer which was there with the plug in clear bag that I gave them.