I remember someone had such situation here, and all the process was the same
I once sent 2 items to same buyer by mistake (1 was for her, and another I sent her by mistake instead of my other purchaser). First she put the item that wasn't addressed to her on sale on Tradesy lol, as if it was a gift for her. I message her and Tradesy team about the situation, and they contacted those buyer, asked to remove the listing and sent her shipping label with the right address. she sent it to my other buyer.
try to call to Tradesy and ask if they can ship the items to the right addresses from their office when they receive it, if you pay for shipping labels. maybe they will cooperate