PUMPKIN CAR STEREO SUPPORT CENTER

i'm not sure if this pace is the right one, but seems to be cool place to post my problem, maybe can point me in the right direction. I'm trying to make it work my new android 4.4.4 unit.
here's the link:
https://es.aliexpress.com/item/Android-4...Title=true
the unit turns on ok, then when switch from the original radio screen to the android screen, always starts with google navigation with settings page, if I close the page, or try to go to android unit configuration menu, the android shuts down and the system returns to the original mercedes benz radio screen.
when the unit starts, shows one logo with "FINEVEA" or something like that.
unit is android 4.4.4
I've already post 3 youtube videos with the situation:
https://youtu.be/KNYiOxMWzVw
https://youtu.be/3X4U7XwscKI
https://youtu.be/T2VBPq3Wzmk
many questions:
1-there's any android update to apply to my unit (how to downloaded and apply it)?
2-any way to avoid the google maps app open automatically each time i switch to android mode?
3-does anybody knows something about this kind of units? manufacture, mcu update, firmare update...?
I'm really stuck on it. really big problem. my car is unusable because I'm in the middle of the installation, with all the dashboard removed, glove box removed, instrument cluster removed, and nothing's work. !
any suggestion will be really appreciated.
thanks you in advance,

Hi,
Sorry for the trouble caused.
Could you please first tell us your Aliexpress order number?
Regarding your issue, it maybe the android system problem, would you mind try to do the factory data reset to check?
Here is a tutorial video for your reference.
https://www.youtube.com/watch?v=vPI52QXAJDs
If it does not help, please send us the current system information.
We can send you the firmware and mcu if in need later.
Regards