My apple id has being hacked

Your phone cannot be hacked!

Your Appleid can only be accessed if you gave away your password .

If so Change it now.

change your appleID password.

https://support.apple.com/en-gb/guide/icloud/mmd601ff0d/icloud

If you cannot access it because whoever got it has changed your password then you may never recover it so contact apple support here: Get Support

Can you log in to iCloud with your apple credentials here?

www.icloud.com

If so, you have your apple ID - but change the password as Peter says.

If you can't, then try to recover your account:

https://support.apple.com/en-gb/HT201487