Tourneau Lies, deceit, negligence, incompetence San Francisco California

I took my GMT Master watch to Tourneau store in San Francisco and asked them to send the watch to Rolex for servicing. The agent lied to me and told me he would send it to Rolex. In fact, he sent it to a Tourneau facility, not a Rolex facility. The watch was badly damaged during the "servicing" at the Tourneau facility and after a few weeks it became completely non-functional, as the hour hand stopped moving, among other things. At the time this happened, I was on my way to Europe for an extended period of time, so I brought the watch to the nearest Authorized Rolex Repair Center to where I was in Europe. They refused to honor the Rolex International Warranty. They said that the service performed by Tourneau was "amateur" and they found the following problems: the hands were broken due to poor handling, the dialer was dirty, the ring under the glass was frayed, and the thorn rotor was broken. I had to pay 900 EUR to the Authorized Rolex Repair Center to have them fix the damage that Tourneau inflicted on my watch. I have discussed the matter with Tourneau and Tourneau refuses to give me a refund. I have written two letters to Rolex HQ in Switzerland asking them for help and I have not received any response to either letter. I disputed the charge from Tourneau with my credit card company and Tourneau has fought the dispute and is refusing the compensate me for the charges.