Adjustment of Status - I-485

Hello,I would like to find out if someone had experienced contacting congressman regarding case pending with USCIS,because I need to know the advantage and the inconvenience of requesting there help.My point is that after been married for over 2years,my wife and I filed for adjustment of status through attorney on June 2015,I received my Ead card on August 2015.We been to the interview on November 3 and the IO gived us printout saying that she's going to review the case until now we haven't heard anything from them,service request they said the case is pending,Infopass back in December 7,they said they need more time,I call the high level CS,after 2weeks they send me the mail saying that my case is just pending.Im trying to contacted the state congressman for help because my lawyer isn't helpful at all...Any advice will be appreciated.Thanks in advance