They'd just pass it onto the relevant team, concierge will have already done that.

Customer service especially concierge are great if its an issue they can get an answer for but for cases like this you need pressure from above. Customer facing agents sadly can just send an internal message saying oi Jimmy any update and then have to wait whereas if you get somebody above the level who will deal with it that message instantly gets a priority as nobody wants to look like they are failing to those above them. 

That isnt just an eBay issue its a business issue pressure only really works from above. As shown by it now being day 26.