Hello how do I know if my phone was hacked

As Lyssa has said, that is a scam trying to get you to reveal your information. Do not reply, simply delete and move on. Also check this link...

Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

No, you didn’t give them access by clicking a link.

Do not download anything based on a popup message.

Do not interact with the message or the sender of the message.

Close the offending page and avoid sites that are involved in such bogus advertising tactics.

https://discussions.apple.com/docs/DOC-8071

Me too! Is this a scam or is it valid?

It is very unlikely that your phone was hacked. Please tell us what makes you think you have a hacked phone and perhaps someone will be able to help.

Those messages are scams.

If you did not provide any usernames, emails or passwords, you have nothing to worry about.

~Lyssa

All my contact information has been removed..

All my friends have received scam emails from my email address.

Very much a scam.

Your Apple ID will be locked and or you will have to change your Apple ID IMMEDIATELY WITH PASSWORD

Ok because on the pop up before that which said you have a hacker tracking you click here to secure your device and I did. Did I give them access to my phone?

how to know my phone is hacked

A non-jailbroken phone cannot be hacked. Did you read this thread?