https://support.google.com/places/bin/answer.py?hl=en&answer=75569
If you try to verify your business listing by phone and it doesn't work, this could be for one of several reasons:
- You have an automated phone system or phone tree.
If you encountered any of the reasons above, please request the PIN to be sent to you by mail.
Whats odd is that you don't have postcard verification option. I recommend you post this problem on their local business forums at http://productforums.google.com/forum/#!forum/business
Good luck!