Review W-9 Submission. Since the issue seems to be related to the W-9 form, make sure that you have correctly filled out and submitted the W-9 form. If there was an error in your submission, it could be causing the problem.
Brother, if you have many positive reviews and only one negative review, clients will likely overlook the negative one. Don't worry and work on improving in the future.
Actually my first client experience was not so good but what I learned from it is that if a client approaches you, the only reason for it is that he wants you to be his/her vendor in lowest price and do whatever he/she said and all these things are good for you and for your client because you get to know how to work with client and your client get his/her work done in lowest price and basically you also got a review.
By the way its my experience with client and some tips to get first client is to make attractive gig photos that properly show your work experience and if your impressions continuously decreasing then change your gig description and use tags with low popularity.
Bro ! It's actually a myth that simply being online will increase your gig impressions. However, updating your gig with the proper keywords can definitely help.
May be your Gig is under review prior to becoming active. The review may take a few days or your Gig needs to be modified per the instructions provided in your account.