Gmail — to delete [protected]@gmail.com

A boy name alok Mishra my ex boy friend is blackmailing me by using my private pics and videos which he has saved in his account [protected]@gmail.com ..after all my efforts i have failed to delete those because he recovers all his data. He hacked my previous gmail account..from there he gets all my contacts details and some important documents...by which he is continuously blackmailing me to continue the relationship..but I can't because he is egoistic person..and he acts like a mental patient. I have report a complain too in police..but they are not serious about this..plz help me Google..u are my last hope.