I got mail from support@appleid.com that I buy airpod $159. I never buy it!

Use the Apple.com menu from your browser as shown:

Click the bag shown by the arrow in the upper right. Then select "Orders" circled below. Find your order (if it exists) and cancel it from there.

Do not click "cancel order" from the email you are showing - just in case that email is a phishing scam.

It's clearly a phishing scam — there are typos. Report it to reportphishing@apple.com