so recently I bought a new house. This house came with a digital lock on the front door, but there are several agents and other people that have the combination to this doorlock. I called the people that sold the house to me and they said that they didn't know how to change the code. So I then decided youtube could be a good source of information. Well, youtube explained that taking apart the lock and getting the blue and red pins then exchanging the around will change my passcode.
So I took the lock apart, but there were no pins!
While I had it apart I though I would try to find a serial number or company name. Still no luck. It took a few minutes of searching on google to find a picture.

so my questions are how do I change the passcode? If you don't know then can you tell me who makes this model of a lock?
Thanks in advance