How can I disable restrictions and/or factory reset without having the passcode of my Apple TV 4K?

I recently bought an Apple TV 4K at our local electronics store. It functioned perfectly when I started it up, except what I just noticed is that I cannot do a lot of things. After a quick Google this turned out to be the restrictions. When I try to disable this I get asked for a pass code. Very annoying, as I don't know this pass code. A solution to this seems to be to factory reset the Apple TV, but that too is greyed out. Does anyone know a way to work around this? As I basically just want to factory reset my Apple TV and start over.