Cant reset used - refurbiahed GAFE Tablet

[AC Question]

I bought a used Dell Venue 5050 from eBay but when I started the tablet it was obvious that previously it was part of some K12 school and thus I can't add another account or remove the current account or can't even do factory reset as all of those things are disabled as it is remotely managed. What are my options to get this tablet restored to original state, so that I can make it minwith my apps and settings and such? Thanks in advance!