Adjustment of Status - I-485

hi im doing a quick update to my pending AOS.

it's been exactly 120 days since my interview at fed plaza, sadly still no decision. i've decided to reach out to Sen. Schumer and submitted my form online to inquire on my behalf. Hopefully they can get a better understanding as to why USCIS needs more time. I did try to call USCIS but couldn't make SR since I already put on in on 12/22/2017, got 'wait another 120 days' reply on 02/12/2018 and in order to do SR you have to wait at least 30 days from the last USCIS reply. here's AOS my timeline

FILING FROM NY

FILING UNDER F2B 245i PD 05/2017

9/30/2016     I-693 MEDICAL EXAM

11/17/2016   AOS PACKET MAILED OUT VIA USPS PRIORITY (I-485, I-485 SUPA, I-765, I-131) FILED USING EARLY DATES

11/21/2016   AOS PACKET DELIVERED TO USCIS

11/25/2016   I-485, I-485 SUPA CHECKS CASHED

11/26/2016  3 EMAIL NOTIFICATIONS (3 CASE #s)

12/2/2016    3 NOAs IN MAIL (I-485, I-765, I-131)

12/9/2016    BIOMETRICS APPOINTMENT NOTICE

12/23/2016  BIOMETRICS APPOINTMENT DATE (COMPLETED)

2/7/2017      EAD SR (77 DAYS SINCE 11/21/2016)

2/16/2017    SR EMAIL RESPONSE. CASE UNDER REVIEW

2/21/2017    EAD CARD IN PRODUCTION

2/24/2017    EAD CARD MAILED OUT

2/28/2017    RECEIVED EAD/AP COMBO CARD (99 DAYS FROM FILING)

6/18/2017    I-485 SR RAISED - NO RESPONSE FOR 60 DAYS

8/7/2017      I-485 SR #2 RAISED

8/16/2017    I-485 SR #2 REPLY AOS APPLICATION IS PENDING AN INTERVIEW APPOINTMENT

9/18/2017    I-485 INTERVIEW SCHEDULED ON 10/24/2017 EMAIL NOTICE  + NOA IN MAIL

9/29/2017    I-693 MEDICAL EXAM UPDATED

10/24/2017  I-485 INTERVIEW, GIVEN 120 DAYS FOR DECISION LETTER

12/22/2017 ONLINE SR REGARDING INTERVIEW DECISION

12/23/2017 I-765, I-131 EAD/AP RENEWAL PACKET SENT

1/3/2018      2 NOAs IN MAIL (I-765, I-131) EAD/AP RENEWAL

1/9/2018      INFO PASS AT FEDERAL PLAZA

2/12/2018 REPLY TO ONLINE SR REGARDING INTERVIEW. STILL UNDER REVIEW ALLOW ANOTHER 120 DAYS

2/21/2018 120 DAYS SINCE INTERVIEW. FILED INQUIRY WITH STATE SENATOR