Chinese double din can't factory reset

I've had this head unit for a while now, today all of the icons have gone blank and the screen looks a little pixelated, and the device runs very slow. This happened after attempting a root. I tried to get into the settings and do a factory reset, but its asking for a pin or a code (numbers only) and I was never supplied with one. I'm not sure if this is common with Chinese Android devices or not. I also tried to reboot into recovery mode, I tried pretty much every combination of buttons while using both the power button (which ks also the home button) and using the restart pin hole button, nothing seems to work.

Looking for suggestions and advice.

Thanks!