People have reported to not having received any sales out of social media marketing simply because if the audience does not have a Fiverr account already, they tend to avoid creating a new account on a site they are not familiar with, just to order a gig.
Maybe the lack of keywords in the gig title is working against you in the search rankings on Fiverr itself. Put yourself in the prospective buyer’s shoes, someone looking to get his car’s color changed.
Which one is he more likely to search :
“change the color of my car”
“photoshop the color of my car”
“airbrush the blah blah of my blah blah”
…the latter two, I guess? use those keywords. (photoshop, airbrush, photo manipulation, digital artist, photo retouching, graphics designer)
Try this “I will digitally retouch the color of your car using photoshop” << It’s high on multiple relevant keywords, and gets the job done. (Don’t rename the current gig title, as your canonical url structure will still reflect the old title). Delete the current gig and make a fresh new one with new title and new url.