Have you contacted google? Follow these instructions. If you cannot follow these instructions, THERE IS NOTHING ANYONE CAN DO!! PLEASE DO NOT POST BACK SAYING THAT YOUR ACCOUNT WAS HACKED AFTER READING THIS POST.
Go to support.google.com
In search bar, enter Hacked Gmail Account
Click on link titled SECURE A HACKED OR COMPROMISED ACCOUNT.
Follow the instructions.
ONCE AGAIN, IF THE ABOVE INSTRUCTIONS DO NOT ASSIST YOU, THERE IS NOTHING ANYONE CAN DO!