Flyers Soft Full stack dot net developer interview questions

Worst interview experience I had ever. 1. Internal technical round to validate.net skills. 2. Internal technical round to validate angular skills 3. CEO phone call round 4. Client technical round They actually conducted the above mentioned rounds and I have selected in all. I thought the interview process was came to an end and am going to get an offer. But they surprised me by saying that they want to see practically how good am in writing codes. For that they asked me to complete one technical assessment. It was like a new User story for their Dubai project. I too did the assessment and sent to them and waiting for 2 business days. Didn't get any updates from the HR. Then when I check with him he says my profile is rejected due to unit cases not done in my assessment. Actually in the assessment they didn't mentioned that I have to write unit test case. And In my 1st internal technical round and 3rd client technical round itself I informed them that I have no experience in writing unit test cases. If unit test case experience is Mandatory for their requirement, they would have reject my profile at initial level itself. Instead of that they have conducted almost 5 rounds. Don't accept for technical assessment round with this company. I think they are using candidates to complete their user stories.