I dropped my Stingray (someone bumped into me while I was wearing the watch) and it landed on the crown. Now the crown and winding stem is stuck together. I have sent the watch to my local watch guy and he cannot get the crown and the stem to unlock without damaging one of the parts. I have tried to contact Mr. Yao for replacement parts but have not gotten a reply. I appreciate that he is busy but I would really like to be able to use my Stingray 50 again. Could anyone help me with how to contact Mr. Yao?