Birlasoft Associate Software Developer interview questions

I applied through a staffing agency. It took 1 month for the response from Birlasoft. Another 1 month to get through the interview. I was confirmed that I am selected. Also received the offer letter but later on the staffing company informed that the position for which they were going to hire me is open again. They are NOT going to process work Visa even if they agreed before. Nothing was formally communicated from Birlasoft people. Also no response to emails & phone. I rejected their offer, HR & Visa department are the worst. No work ethics at all. The HR has to learn how to speak, very poor communication skills.