Sorry fir what you have gone through. Best to have an in-depth consultation with an attorney to determine if you have a viable malpractice claim....

how can i change my EAD card name?

You can request a new EAD by filing a corrected I-765 and you don’t have to pay the fees if the error was due to the USCIS own fault. Otherwise,...

What should I do because I have not received my Biometric Appointment yet after receiving I - 797?

It is not clear what application or petition have you filed or filed on your behalf? You may not need finger printed at all.

I751 and N400 interview?

It should be no problem but make sure you have all other required documents with you. Also would help if you take the proof that you have asked for...

How long time is permitted to stay outside usa without losing my green card ?

Permanent residents must intend to reside permanently in US and they may lose green card if abandone their residency. Different circumstances...

Filing application for citizenship through marriage after 3 years, so Do I send bills, leases, car insurance with application ?

Read the instructionss for N-400 to see the required documents.

What is next step after filling up I 797c?

What approval or certificate are you seeking?

Mr. Seagull is right. EAD is just a work authorization.

My i-130 has been approved and i got the visa but it was sent to my home country and I'm in the US?

You be misssing some facts or you misunderstood what the visa is. Consult with an experience immigration attorney.

It is right. No unlawful presence accrued during pending asylum process.