Is there anything else to reset on the iPad?
If you go into the Settings app and go to General at the bottom of the screen there's a tab called "Reset". Some people who've had problems pairing with H9s have found that using the "Reset All Settings" function under this tab fixes their problem, and it might help with yours as well. Using this function will wipe out your iPads WIFI settings and your iTunes username. So you'll need to re-enter those but it shouldn't affect your installed apps.