CGI Full Stack Developer interview questions

I have faced very bad experience with CGI. I was applied for Java developer, I got a call letter. I went for interview on mentioned date. I reach by afternoon when I met the contact person, he simply told like we are looking for minimum 3 years experience. Then I argued with him, then why did send me the call letter. He simply said, I don't aware of that you check with HR. Later he told me to attend the Java full stack developer role interview which was contacted by different team. As I have some experience in Angular 4, I said ok and attended the interview. Usually if you go for walk-ins then you should have patient always. I was waited around 3 hours simply. First round: Basic Java and angular questions Second round : Medium level Third round : HR round I got selected and HR told like I will get an offer letter in one week. I got a link in two three days to submit basic details, documents and I have submitted all the documents before deadline. I waited for a week and contacted them, I got response like we will get back to you. Second week gone again same reply, third week gone again same reply. On this point I lost my patience and then I questioned HR. He told I need to attend one more round and need to clear that which is project specific interview. Again I attended the interview which is telephonic, I have answered 70-80% of questions but I didn't get any response. After one week they called me and asked my availability for next round. Even I performed good in that. Then again the HR said I will get back to but haven't receive any response after that. I stopped to follow up with CGI. My kind request to recruitment team, don't treat the candidate like anything, candidate spend more time to prepare and travel to attend interview.