icloud activation help ipad 2

Hello everyone

So I'm here because of my iPad 2. My daughter broke the digitizer so I replaced it and of course this broke the backlight so I now need to repair that but in an attempt I did a factory reset and for some reason wen it came back on it had a different icloud activation email iv never seen we have had this iPad activated to both mine n mums email prior to this so don't understand we have had it a good 3year without any problems what can I do?