It is too soon to know how applications will be adjudicated - the grant is discretionary. You will need to speak to the attorney who knows the background on your case for a better idea of what your chances may be, but you won't be able to get filing fees returned to you after you have filed.
I agree with my colleagues, filing fees do not get refunded after filed and accepted. Even if you used false documents it does not necessarily mean you will not qualify it is discretionary and USCIS will review all of your evidence and situation to make the determination.
DC Metro Immigration Law PLLC, Arlington, VA (202) 470-1004 provides the above for information purposes only and does not construe or intend to provide any legal advise or an attorney-client relationship. You should contact an attorney to discuss your personal circumstances and for legal advice.