Why didn't there be a short message number after Pinduo arrived?

Why didn't Pinduo answer the code and send a text message? Pinduoduo, if you get a code, no text message. You can watch it in the shopping area. First, you open the Pinduoduo. When you open it, it's mine. You click in. After you click in, there is the product you bought on it. Just click on the product you bought, and then there is a pick-up code.