need to chat regarding my watch (phone is in lost mode so i can't call)

My phone was lost in Schiphol airport. "Find my phone" says it is still there in the airport and I put it in lost mode, but neither Delta nor Schiphol lost and found is willing to help me to confirm where it is there. I thought I'd be able to use my watch to make calls and get cell service (like I can in the US from my carrier TMobile), but I don't have service on the watch. "Find my watch" says it can't find it. Is this because I have the phone in lost mode? I can't call Apple for help because I have no phone. Please help