Envirya Projects interview questions

I applied through Angel and quickly got a response from Founder and he took a quick intro call and gave me the assignment to work on. I completed the assignment and submitted it in two days. The next day I got a call from him and he scheduled my interview with another person and got selected in that interview. I got an SMS from Founder that they will be offering me this much CTC which was very less than what I was withdrawing but I accepted it and they requested me to submit documents for processing my offer letter. After submitting documents I never got any mail and they never responded to my emails and phone calls. Such unprofessional people. Stay away from people like these.