Fiserv Senior Software Engineer interview questions

I got a call from AZ7 Consultancy Bangalore to have interview with Fiserv and scheduled on Saturday 10 AM. It was started on time and i have been called for my Technical Interview at 11 AM, It went for 1 Hr 30 Min, Interviewer asked me in depth questions from OOPs, C#.net, ASP.net, SQL Server, WCF Service. Interviewer asked me to wait for Manager round and finished in 20 min. Here is the twist comes, they called me for HR round. When i asked them i am expecting 30% hike, HR(Neeta) shown all face expressions as i have done some crime. She said there is some miscommunication from Consultancy, let me figure it out in evening, we can give only 25% Hike.As we all know, Infact without asking all company gives 30% Hike but this company has their own policy.Any how i have accepted this Offer as this was my First Interview during Job Hunt.She said she will share the Salary Break up in few days and if you accept that we will be sending the Offer Letter. Friends Don't believe this company, they are Fraud. They have send me the Salary Breakup and after my acceptance they didn't send any Offer Letter till today. After following up multiple times there was no response.

1 hour phone interview on technical subjects, reviewer seemed impressed. Interview with 3 co-workers, one complained about how he worked there for two years before being hired full time, and almost suggested I don't take the job. One asked technical questions, kind of off the wall; on one he mentioned he hadn't heard of a term either until he started working there. Other person asked some fairly straightforward questions. Wierdest interview I think I've ever been on. None of the people I met seemed like they were prepared to interview someone... If it works out I may go to the next level just out of curiousity, but then after reviewing this site I might just keep looking...