Deaf and dumb people want to buy things online, cash on delivery, but they won't answer the phone. What should I do?

I am deaf. I occasionally order online many times. Don't forget to send a text message after filling in the address. The courier will send you a message when he sees it. If the courier is busy, he may not send a message. When you receive the call number, please ask the listener for help, or you can reply to the text message. Is the courier there? Here it is.

Give me extra points