You'd better to write a letter to the director of

USCIS service center where processed your I-539 case firstexplain your situation and ask a new I-94,usually the stuff work in the USCIS customer service center (deal with your phone call )aren't immigration officer,just civil clerk,they might not resolve complex case.By the way, the Congressman may interfere your case,but usually it's not very easy to persuade him/her to involve your case unless the case is relevant a U.S citizen's interest.Seem write to the director of USCIS first is a better way.