Send In For Repair.

I had this happen to my legacy turnlock. I went to the coach store in Danbury and they sent it out for me. They waived the $20 fee because I went into the store. It took about 4-6 weeks to get my bag back.
 
I also had that happen to me. It was a Legacy Pocket Shoulder Bag in Whiskey. One of the turnlocks fell off and I went to my Coach Store and they said that it was common with those bags, especially the 1st run. They said they didn't think it could be repaired and offered me credit or a new one. They didn't have Whiskey anymore...so I took white. So it all worked out!:tup: