I had the same issue when I ordered a jacket during their seasonal sale. My tracking didn’t update for nearly ten days, and it felt like shouting into the void trying to get answers. Eventually, I found helpful contact info on https://quince.pissedconsumer.com/customer-service.html which led me to a real agent. They explained the delay came from backlogged inventory and confirmed a shipment the next day. The tone was calm and honest, which helped ease the frustration that built up waiting for updates.
Jordi Bennedict