I don't know why you are so worried. You bought it yesterday, not two weeks ago. Ebay won't do anything until after the estimated delivery date, and certainly not a day after you bought the item. The "within a business day" (or anything else) is normally accompanied by "usually", which means sometimes there might be exceptions if the seller cannot post on a particular day for whatever reason.

By the way, naming and shaming is not allowed on this board. You can share the item number, but not directly the name of the seller.