Infosys Developer interview questions

I attended an onsite technical interview at Infosys for a software engineer role. The technical round covered c#, .net and database related concepts. The discussion was detailed and focused on practical understanding rather than just theory. Immediately after the onsite interview, HR verbally confirmed my selection in person. They discussed compensation, benefits, and onboarding timeline, and assured me that I would receive the official offer letter the following week. However, despite multiple follow-up emails over the following weeks, I did not receive any further communication or response. The technical interview experience was positive, but the post-selection communication was disappointing.