Hello! I purchased a men's leather Tom Ford backpack at a department store and after wearing it a few times one of the straps started coming undone. I reached out to TF but they said they won't repair items not purchased at a TF boutique. I can't go back to the department store because it's in Switzerland and I'm in the US. Where do you recommend that I repair the strap? I'm worried about taking it anywhere since I want to make sure they get the stitching correct.