Genpact UI With Angular Developer interview questions

I got a call from a consultancy via Naukri. They scheduled a face to face for the next day. I reached the campus around 11:30 after I had the consultant call me multiple time urging to reach soon as the panel was asking for me and waiting just for me. I reach the office and there are around 5-6 people. After taking my resume they make me wait for 1 hour without any update. Then they HR sends me and another UI candidate to another building as the interview is happening in that building. On reaching there again they take the resume and make us wait 1hr before informing that we need to go back as they are only taking java interviews there. Now back to original building and after few stern words finally they find a panel to take the interview after another 45min of waiting. Now only thing needed was an empty room which we found in a small pantry after looking and waiting for 20 min. By now in my mind I'm done and the interview was a formality. Some angular questions only which I was too out of it to answer and another 20 min wait for HR to inform me that I had made it. And as for the other UI developer, he left without even giving his interview as they just weren't even bothered. Spoke to the HR after that and he said he had no idea how the mix up happened as it never happens. From what I can tell they were looking for full stack developers and not just front end developer and there was absolutely no coordination.