Unlimited revisions are never a good idea. (100% money back/satisfaction guarantee are also very risky. It implies that you’re not confident in your work and attracts scammers.)
You need to remove the behanced url from your gigs. (TOS)
Duplicate gigs are against the TOS. You offer two that specifically do background removal, and the one with reviews is almost a direct copy/paste of your ‘anything Photoshop’ gig.
There are several English errors in your gigs and your profile.
In your profile, “Languages: English - Fluent” is inaccurate. It should be ‘conversational.’
There are several formatting issues with your gig descriptions that make it/them look unprofessional. There’s such a wide difference in style in them though, that I suspect you didn’t construct them.
Professionalism includes consistency and honesty, and there are many things that can turn buyers away. You have a good number of sales and reviews, but you need to fix a number of things to stay competitive.