Try logging in to your GV acct. On the left side near the bottom you will see your GV number. Click on it. On the next page you will see Settings, below it you will see your phone number, forwards calls to Google Chat, and your number.
Be sure Call forward to Google Chat has a x in the box, and that all boxes associated with your number are NOT x-ed out.
This should stop all in bound calls to your cell. IF that is, your cell was the confirmation number used to set up your GV acct.