Crio.Do Customer Service Associate interview questions

The entire process took 3 days with 3 rounds of interview each. Initially, live assessment round on email drafting, second mock call round as an agent, third round with the founding team. All the rounds went very well but recieved rejection mail. If the budget was an issue, then why was the interveiws conducted with misplaced expectation. The professional has no regrets to waste candidates time .