Continuing the discussion from Lvl 2 question?:
You can try deleting your gig and start over again, but it might be hard for you to get sales.
If you are going to start over, you should hire someone to edit your gig, just by the poor grammar a lot of people will end up avoiding you because of potential communication problems. Aide from that it does make you look unprofessional.
You should try looking for someone here who can help you with the gig description.