Adaps interview questions

They have seen my profile on Naukri and discussed all the details. they have sent a link for Assessment. I have cleared that assessment and one technical round also. finally they called me and said like you have been selected for so on so position. they sent a mail for required documents before joining . So, I have sent all the required doc's but at the joining time they bargaining the employees like vegetables in the market and rejected me without any reason. I think it is not at all fair.

The interview process was held on campus and there were 2 rounds which were the technical round and the hr round I liked both rounds. In tr round they asked about my usecase and questions around that.