Hi Everyone,
Sorry for my late response, However I got my Gig back right after 1 month. Here are the things which I have done to get my Gig on the first page.
1) I have changed my internet connection which has changed my IP address so Fiverr considered it as a new Gig.
2) I have changed my Profile image, Gig image, Title, Tags and Description as well.
Follow the above methods and you will get your Gig back to it's position in 1-2 days. I hope it will be helpful for everyone.