Bosch Home India — interview successfully completed offer letter on hold

Hi

I have attended bosch bamglore adugodi campus in june. I cleared all intervws and hr told we will release offer letter. But after 2 weeks when i am asking them they are telling offer letter is in hold. Espicially the hr name is vinod kumar in adugodi campus banglore he is always telling in offer in hold. Then what is neccesity of calling for intervw if they cannot give job. Useless hrs