There can be browser settings or other issues that cause the support button on the top right of your Gsuite admin to not work. There is no way to retrieve your support pin to call or start a chat without that button. Here is a link to access that support window manually if your button does not work. Make sure you are logged into your Gsuite admin and then click on this link: https://apps.google.com/u/1/supportwidget/helphome