Edge (CA) Client Relations Associate interview questions

After being shortlisted for the role they have conducted an assessment. Then scheduled an online interview that went well after that they scheduled another one three weeks later and at the end of interview they mentioned that they are not hiring right now and would let me know after 4 weeks. Why would you even post a job when you’re not hiring. After 1.5 months I emailed them for follow up and finally After my 2-3 emails they again scheduled third interview which I think was just a formality as the hr was like we have talked before so just give your introduction again and after that she said we will let you know soon. Fast forward to 2 weeks later no reply. I sent a-lot of emails to them asking about the decision. No matter what I believe every company owes a interviewee a simple email stating that they have not been selected especially when you have scheduled three interviews with them. After my 5-6 email I got a reply that sorry we have to more forward with another candidate. No matter if you are offering 200k or 600k least you could do is fix your HR department and be more professional. My application process started in June and I got closure in September that is so unprofessional.