FIS Senior Software Engineer interview questions

I had applied for Senior Software postion-Java. The interview process took a week. On Day 1 , I went through an online test and a technical round. I could clear both rounds and was called again next week for further rounds. On Day 2 , I had my 2nd technical round and then a HOD/Director round. I cleared both the rounds and I was informed by the HR that I am selected and I'll get a call for salary negotiation. After two weeks I got a call from HR, we agreed on the salary proposed by them. I was told I'll get the offer within a week but that never happened. I've seen companies who don't release offer letter due to salary concerns but I've never seen or heard from anyone of such a company where negotiation has happened and they still don't release offer. The HR kept assuring me for several days that you'll get the offer, he said "hiring has been freezed for now". The whole process was a waste of time and energy. It was a very bad experience for me and I would suggest the recruitment team to be a bit more reasonable and honest in the recruitment process.