Visto Software Engineer, Backend interview questions

Cleared all the 5 rounds and asked to submit documents for offer letter. But offer letter was never released and after one and half month of continuous follow-up, they apologized by saying the Hiring is a freeze. All the rounds (total of 5) happened on the very same day in their Bangalore office. The questions were really very good and difficult level. The interviewers were really intelligent people. They covered almost all the concepts: Data Structures, Java OOPs concepts, Java Collections, String Problems, Recursion, SQL, Linux fundamentals, AWS basics. I cleared all the rounds and were asked to submit the relevant documents for releasing the offer letter and I did that the very same day. But no offer letter gets released and after repeated email at two weeks interval, everytime, we get a reply that they will need more two weeks to get the offer approved. Finally, after one and a half, I was informed that the Hiring is freeze and I was asked to look for other alternatives. Completely unprofessional HR behavior and a time waste for the candidate and their tech team who took interviews. Request you to not attend this company for the job change. There might be budget problem from their end as I am already getting high pay in my current company. But the pay was clearly mentioned to them before process initiation. If you don't have money, please don't waste candidate time.