Can i take action against the Office of Citizenship and Migration Affairs(OCMA) in Latvia ?

This not a US immigration question and should be re directed

Obtain a new passport from the Indian issuing authority

Do I need a waiver if I'm from Mexico and want to change from J1 to H1b visa?

If you are subject to a two year home resident requirement you need to either fulfill the requirement or obtain a waiver.

Do I have to leave USA if i dont get a job during my OPT?

A student must maintain status and have valid F-1, and I-20 file for OPT and receive Employment authorization. Based on a pending petition from a...

H1B extension while transfer is in progress?

You should discuss this with the immigration attorney that represents your employer. It may be possible to apply as you indicate but it may not be...

What does immigration consider hardship of the child if parents are deported?

There is no petition based on the hardship of the child. The couple should contact an immigration attorney for assistance to learn if there are...

WHAT happens when your green card interview is transferred to a different state by the officers

You will likely be re-interviewed in the receiving office.

Travel is permitted with a valid passport, visa and status.

As a US citizen, You may marry anywhere that it is legal for you to marry.

L1 to H1B COS

No. Now that you are in H-1B status you need an H-1B visa to travel.