i had some troubles with some client and i offered him to cancel the gig and get back his money but he refused and make a very bad rating and comment i need to delete my comment and his comment.
That was like 9 months ago, dude. You can’t get rid of it.
so should i remove the gig an start with new gig
You can’t just delete a rating. You and your buyer have 3 days to modify a rating. If you delete the gig your overall % feedback score won’t change.