I feel your pain, I was exactly in your situation merely hours ago. I wouldn't worry too much about it, it's been about a month for me as well. However, a few days ago I decided I would stop waiting and started asking on the forum how to refine my GIG. I made new images, switched description, tags, tried to look at my competitors (what they are doing... what work, what doesn't) I even actually switched the GIG name twice.
What are your stats looking like? (Impressions, views, clicks)
Are you advertising your GIG (I would suggest advertising on social medias and asking friends to do so as well.)
Personal advises: About your GIG name, it insist on the fact that your work is UNIQUE. However, the presentation image is actually one of the simplest (two colors, simple font, underline, etc) I would suggest working on your portfolio and then trying to switch up your images.
Still about the images: I, personally, prefer your third one... I think it looks more professional than the other two (not that they are bad) but especially for a graphic GIG, expect to be judged in a split second for your graphic presentation.
Also, your keywords are kind of unrelated (flat, minimal, modern, company, custom) if I was you I would go and try to learn more about tags and how they work for your future GIGs. If you don't want to, however you could always watch Top Rated Sellers in graphic designing and try to see what they use then figure out what works or not.
I also make sure my keywords repeat themselves quite a few time, IE: I have the word "PREMIUM" in my title, it's also one of my keywords, it SHOULD also repeat itself somewhere in the description (which wasn't possible due to word counts in my case).
I hope this will help you get your first sale pretty fast... Wish you an awesome day. Also don't be afraid to ask questions when necessary on Fiverr Forums, some people have been of great help for me and helped me get better so fast as a Fiverr newbie.
EDIT: LAST NOTE: Also, you need to understand that you are in a highly competitive market. If nothing works, don't be scared to drop your prices for your first few clients (and ratings) and adjust them back accordingly later in time.