I work at a computer repair shop and got an iPad mini in for recycling.

I received an ipad mini 2 from a customer the other day and it wants me to sign in using a company log in and cant go any further. This little old lady received them from a business friend of hers that their company uses them for their work. They gave her two to use. one works great and no issues. This one ...well goes through the first few start up pages then askes me to "sign in" using what looks to be a company username and password set up. i dont need any data nor am i looking for any, i just want to reinstall a fresh version of iOS on it so i can use it. Also at the bottom it says "this ipad is managed by shyp" no clue. any help would be awesome