Prospecta interview questions

The interview process was smooth. The company held technical and HR rounds on university campus, and they had another interview in office. Then they had an interview with HoD online. After all the rounds, I was informed that I was selected for the role. Following this, I received mail about another interview post selection, after which there was no response. Two weeks later, I find out from my university placement cell that they have rescinded my offer despite all my interviews going well. Almost rejected another offer to select this one.