Most unprofessional organization - Software Engineer Infovision, Inc. Employee Review

I was not knowing much about the company , but after seeing it's rating on Glassdoor which was more than 3.5 , i considered it a really good company. I went through the interview process and got the offer. 1. they are offering salaries below industry standards. 2. They are again and again changing the joining date giving the reason that the projects went on hold. And now saying you can pursue any other offer if you have. 3. When I discussed with the HR he said nothing is in his hands, it is all decided by top management , he can not do anything.