The fact they are not responding to chat is BEYOND INFURIATING. Sadly, ShipStation keeps going downhill. I am looking into both Pirate Ship, Shippo + Ship Hero to compare.
SS is the most expensive; and they do not pass on shipping discounts (unlike others), I did not mind becuase I've been using them for years without issue. Previously customer service was excellent. Now it's deplorable. Time for an alternative!