Need help please

I have a Samsung Tab E for sprint. I know this might be not the right place but I couldn't find a section for that particular device. the issue I'm having is it has only one software one it or app which belongs to a Taxi company. when I try to go to settings it tells me security policy prevents access to settings. I also did a Reset for the tablet but same thing I also reinstalled the software on the tablet but came back with the same thing. I can add a guest account and see all the default apps for any samsung tablet but can't root or do anything because the main account is the one that has the one taxi software. Please any ideas how to remove that and be able to root and install Rams and put it in debugging mode ... etc.


Thanks.

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