i need help ,after 11 months Nebraska ask me for 4 additional informations for my I-140 ,we sent all 4 to them ,3 weeks later they sent request for information again ,but just one ,they lost mine labor certification ,,my lawyer sent them copy with original signiture and they didnt like it because they need original ,but they lost it ,, i cant get original so we sent them copy but approved by attorney at law, and now its 3 months and my case is still pending ??and we have no answer from them ,,
im very stressed and dont feel good about it,
should i call customer service?? or what to do ?

MY lwyer asking me to sign document G28 is it gonna help??
and how long it will take to get Green card??