I did a factory reset a tap start as new n tell me to put in the last

My tablet was stolen from a friend friend who visit us. I use all my old Google's account an passwords, an change my password as Google let me but it change all of my Google account on phones too except my tablet. I try to reset n still asking for the last user name an password. It's been like this for over week or more please help me an I also try bypass, no luck. Please help me.