Go to this link
Click on contact us link and choose live chat.
This feature may not be available all the time and availability may differ from your country and time-zones
You'll have to click on the gear icon next to the customer ID at the top right corner, then click help. There you'd find Live Chat as an option to reach the support team.
I agree with Sumanth.
Follow these steps:
- Login into your Google Adwords account
- Click on gear Icon which is just on right corner
- Then click on Help link
- A pop will be there. Click on "Live Chat" link which will be right side of pop up window