Initially they approved and allowed me to send in new Laptop which 1 to 1 exchange but i have to send in to check, but end up they said its GPU faulty the replace me a new one (GPU NOT LAPTOP) so i get a new GPU (not sure its new, they dint change i also dont no lol).

Like I mentioned, have you check if adapter has power? Can you confirm if the issue only happen when the screen is connected? Also try to use hwmonitor to see if it overheats.
It is likely that the tech on their side is honest with you if they have picture to prove its no fault found on their end.
So if you have concluded that it is surely not your end problem, just formally submit your pictures and insists on warranty from them provided that you did not insists them to give you a new one on the spot.
For me, if you have picture of no nvidia in device manager, it should be enough to ask for warranty. Unless your nb is those type that has detactable gpu.

Ive texted Illegear this morning, still waiting for reply.   
Updated: 3/3 1.00pm

I get a reply from Illegear, they request me to send in again for diagnose.

And they will cover warranty for me this time, what if they still never find out the problem after DDU the driver? i will back to square one?
oh and this time i have to bare the shipping cost. 

Wow rarely see pc thread on k can reach 300 reply

More  surprised that /k actually get decent reply.

infacous company, sure many replies

I'm not an Illegear customer or endorsing their products but I've seen chinti and others continuously bash Illegear daily for everything, I'm not sure what beef they have but it's best to be neutral on this kind of issue.

We probably don't know the full story and the only way to solve this issue is for Mr gentleman here to send in for warranty claim. Maybe he can also post the entire WhatsApp chat for everyone to see and not just a few snippets of his own selection.

If they still don't fix the issue then I recommend you to take action by going consumer tribunal, etc. As they mentioned you only contact them at around 1pm when this thread started at 10am, why do that unless you wanted to create drama at /K?