Does momcozy pump have good return policy?

The website says 7 days after delivery date for warranty and returns. They also say no returning used products. What if you get the pump, open it, try to use it and it won’t work? Let’s say you ordered the pump a month before due date. By the time you try it it’s way past a week and you used the product. Are you basically stuck with it at that point? Does anyone know?