Replace Greencard

 i am currently having a hard time with usps and uscis over my green card which was mailed but never delivered and i am willing to chase this to the roots even if i have to sue usps. in my case it was mailed on the 14th of october 2015 to arrive on the 16th of october but till date i am yet to receive i have been to the usps office repeatedly and the postmaster promised to send me the letter of non deliverance which usps requested but till date i got nothing and no body cares! usps is asking me to pay over $400 which i dont have and the status of my card is showing still in transit not delivered i have reasons to believe that someone either in the usps or uscis or both re doing some illegal business with these cards on the side otherwise why is no one being held responsible for the non delivery of these cards?????? why do they expect the applicants to just go ahead and pay again as if we pick money off the streets ? anyway have you been able to resolve this yet ? i am thinking of suing usps at this juncture because i am definitely not paying another dime - not that i have it anyways. someone here suggested i apply for a fee waiver but that is a very longish form that only lists finanacial hardship as reason for a waiver.this is a matter of principle and someone needs to be made to take responsibility i have read so many blogs with people going through the same issues- please could someone advise me on what i can do ?