The problem for those of us based in China is there is no globalist or concierge hotline. We have to call regular customer support who will put us on hold for 10 minutes to see if any concierge is available.
I've never had one free. Not once. They say they'll call back but I've never had one call back in a timely manner. Usually 3-6 hours later is considered fast. In meantime hotel and airline prices change and I might be in a meeting unable to take the call. Then the process starts all over again.
I'd be happy to call a regular globalist line and place TSUs but there's no way to do so from china unless you call the US number. The regular CS agents are reluctant to try to confirm a TSU and they don't know anyone anyway to request better treatment.
I've asked for a dedicated phone or WeChat line for concierge but they don't have. Even WeChat goes to the main line and the. You get transferred at some point