I traded-in iphone7 when I purchased iphone11 on 24th Sep. I received an receipt too but I haven’t received my money $150.

Do you realize you have posted a LOT of personal information to a user only forum? Never post personal information in a public forum. I have asked the forum hosts to remove the personal information to protect you.

It appears the chat session you had showed they have 14 days after receiving your phone before you'll get your refund.

If you are still concerned, contact Apple directly. We are are only users on this forum.

You can't, but the page you posted with the trade in information, which showed your personal information was deleted by the forum hosts.