Oops, I think I missed a step. Sorry about that. Where should I request badges ?
Go to your profile and click on "Awards":
Click on "Show Available Awards":
Go to page 5 and locate the PST Challenge:
There is one icon on the far right of the PST row in my image. Clicking on it will give a list of people who have the badge. If I did not already have the badge, there would be a second icon of a hand present also. Clicking on the hand takes you to the badge request page. On that page you should provide the link to your 30th day post.