Hi there Supermum and welcome to the Blossom community
I'll try to help you out! First thing I need to know: did you have the game connected to Facebook? If yes, then all your progress is restored there and all you'll need to do is to reconnect the game to Facebook.
If you did not have the game connected then I suggest you start up the old iPad and connect it. This way you'll have a complete backup of all your levels