is there anyway i can get help with locating a device if i don't know the icloud password but have proof of purchase

You can't sign in to locate the device with the proof of purchase.

If you forgot the Apple ID (iCloud) password, enter the Apple (iCloud) ID, and click Forgot Password. See if you can get a Rescue or Notification email option if necessary. Link to contact Apple Support at the end of the 2nd article.

Apple ID - Manage  -     

Apple ID – Forgot Password  *