Samsung - Samsung Galaxy need to be returned and get refund

Regarding A**S mobile phone:
Phone was purchased on **th October from offline market shop and I am facing issue with face unlock, its very unreliable or inconsistent. Visited twice in the service center and they reported that they didn't find any issue with face unlock. Now followed with CEO desk team for the last * to * days regarding A**S face unlock issue.
Your service center guys only know software updating and casually checking functions, they don't go in depth, don't review issues, they had reported that phone don't have any issues, hence I had submitted issue videos but Samsung CEO desk employees don't trust on videos shared by me, they need documented proof. What else proof do you need than direct issue capture?
If your service center may not able to capture the issue, it not means phone don't have any issues

The fact is that phone don't have dedicated sensor for face unlock and its relying on poor front selfie camera for this function. I observed that selfie camera can unlock with face unlock mechanism only when there is kind of direct light on my face
Video attached here

In the video I have captured face in small room with tube light by showing back to tube light (This shouldn't be an problem since front camera is able to capture face for face unlock) and after that I have tried to unlock face multiple times but it did not succeed and when i turned my face in front of light, it started unlocking phone, again when i turned back, its failed to detect my face. I cannot have light on my face all the time while face unlock and that's why its failing to unlock face in *st attempt most of the times

It seems Samsung don't wish to accept the issue and subsequent phone return and refund and don't care for the end consumer as well.
Why should we tolerate / ignore these kind of issues when you charging us maximum for mid ranged phones and Samsung CEO / top management is fully ignoring India customers. You are gaining maximum profit from India but you don't want to accept issues and provide appropriate resolution. Despite dropping multiple emails to top management along with video footage of issue, I did not hear single word from them
Better you should be forced for refund