Hi it's been 2 years that i did my i-485 application March12th 2014.My case is at Texas Service Center and still pending

Hi it's been 2 years that i did my i-485 application March12th, 2014. My case is at Texas Service Center, i called them on March 3rd, 2016 here is my information: Name: Kani Magassouba
Date of Birth: November 6th, 1990
Alien Number: A-200-921-159
Case Number: SRC1490182242
Adress: 819 East 173rd Street Apt#5G Bronx, New York 10460
i did 9 service request and still saying no final desicion.
it is currently under extended review and this has caused a delay in processing time. More then 2 years no final desicion.
Please i need help my working permit will be expire on April 30th, 2016 again. Every year i have to pay $380 to renew it and i already apply for my Green card 2 years ago. Thank you