My Bestselling gig lost rank. What can I do now? Please help
Know that fiverr uses a rotation on rankings, which mixes new/shy gigs with the best selling and most popular gigs.
As you gig may been placed on the top in the place of another gig, now other gigs may go to the top in the place of your gig.
Allow 1-2 days, it will be back to normal spot. If there is no positive outcome, contact support, they will fix it for you.
Edit your all gigs of tag then check next day I hope you get better result.