HCLTech Senior Software Engineer interview questions

They took first round in Feb in which i got selected. After that no response . All of a sudden i got a call 2 months later to give 2nd round . I got selected in that . After which they asked me to submit my documents in portals. After spending hours doing that the hr told me i will get the offer by end of week. Its been 1 month now the HR doesn't even picks my calls. I would suggest no one to appear in their interview . They wasted my 3 months .