Amazatic Software Engineer - Front End interview questions

I had two technical rounds and 3 hr round. My two rounds went pretty well and I got to the hr round for the negotiation. They said they can provide my said ctc after having a managerial approval but they schedule a meet with the client company. I gave that client meeting as-well but after lot of confirmation promises for the particular Role. The company hr stopped connecting with me. Wasted my valuable time in 4 rounds of interview.