To find your Review Campaigns, you can log into your Customer Portal and go to Listing Reviews on the left side of your page.
Step by Step to Reach Review Campaigns
1 - Log into your Best of the Web Customer Portal: https://portal.botw.org/
2 - Go to Reviews: https://portal.botw.org/reviews/
3 - Choose the business you would like to access campaigns, and click the CAMPAIGNS button