Persistent Systems Senior Software Engineer interview questions

Process was not well managed. My first technical round was at Persistent office, second was a telephonic interview. They could have conducted my HR discussion over phone, but they actually wanted to disturb the candidates, hence they called me in their office for HR discussion. In HR interview, they told me that I will be getting the offer with expected salary in 2 days. But its been a month, I haven't got any offer and whenever I called the HR never picked my call. And when they picked they rudely said that my offer is still pending with approvals and few days later they told me that they can offer me something which is way less than what I asked for. Complete waste of time. They will neither answer your call nor meet your expectations. Don't ever go for this company.