The phrase "goods are not returned or exchanged"

Question:
This man is asking, Shaykh, about the phrase “goods are not to be returned or exchanged.” Is this phrase correct?

Answer:
No, it is not correct. Goods are to be returned if there is a defect in them, and they are to be exchanged if there is a defect in them. They are exchanged for sound goods, and the door that Allah has opened for the buyer to return goods with a defect and to exchange a defective or adulterated item is not to be closed. Yes.