Disha Publication interview questions

I had a good interview experience initially. The process started with a virtual round, followed by a final in-person discussion at the office. During the discussion, everything went well, and they asked for my salary slips. They then shared their budget, and I agreed to it. The HR mentioned that they would send me the offer letter the next day. However, they did not follow through. I have been taking regular follow-ups since then, but there has been no response. It feels like I’ve been completely ghosted, which is quite unprofessional.