Okay, connect your iPad to your computer, backup your data, and then select to restore it. Afterwards, set it up as new. After that, go through each and every setting and make changes accordingly.
Just as a note it's also good to do a fresh restore. Do as above but once you plug it in and back up hold down the power button and the home button. When the apple logo comes on let go of the power button and hold the home button until you see the plug icon. Then restore and update. This is recovery mode, it's give you a totally fresh install.