long_horn,
Thanks for the details. Yes, you are right, my employer was A and I signed non competent with A but that had terms like if I can not work with any vendor, client for which I have started my job at least up to one year of resignation.
As there are so many layers, they do not have direct link with client and vendor. Further, Middle layer already breach the contract with vendor saying me as middle layer's employee so middle layer can not do anything to me. Only thing is based on that non competent doc that i signed, whether they can file a case or not.
I know they have done so many illegal stuffs but I have proof of resume modification.