This Mac is locked The system PIN is required to use this Mac.

If your company isn't using Managed Device software on company owned assets, you'll need to get the login credentials from the previous user. Otherwise, with a valid receipt showing company ownership and a serial number Apple would be willing to help. They won't without verifiable proof of ownership.

And if this Addigy is Managed Device software, contact them as you should be able to reset devices using their tools.

Let me see if I understand this. You pay a company called Addigy for MDM software, which by nature of MDM is supposed to protect enterprise owned assets from being locked out of use by users and this company is telling you they can't help you and you need to get Apple to unlock the asset? What are you paying them for?

I'd dump them and hire another MDM provider to provide you tools which do what you're paying for.

Unless you have the actual receipt with the MacBook Pro Serial number on the receipt, you may not get any help from Apple. You can ask them, but I feel sure they will require the actual proof of purchase.

Are you the original owner of this MacBook Pro?