Incredibly disappointed with Clockmasters. Brought...

Incredibly disappointed with Clockmasters. Brought my Graham Silverstone Automatic watch in for service for condensation buildup under the crystal. After spending 675$ and over 3 months I finally got the watch back but it didn't keep time well and the calendar wouldn't work. So, I brought it back. 3.5 months later I got the watch back. It has run incredible slow for about a month and last week the minutes hand stopped working all together. I decided to bring it to Chesterfield Jewelers. They told me today that it had NO evidence of any work being done on it. I will now spend an additional 450$ for a complete overhaul and new spring. I will never bring another one of my watches back to them.