I sent money from apple pay person to person and the money is out of my account but the person says he still hasn’t received the money what do i do?

Hi

Follow the instructions here, if necessary including contacting Apple Support via the link in the article:

If you need help sending or receiving money in Messages with Apple Pay - Apple Support

I'm afraid that no-one here can look into the issue for you. You are not talking to Apple here - this is a user-based technical support community.