Following up on this issue i had.
Send an online inquires to LG, and within days, received a call from LG and said they will send a technician over to evaluate my problem.
On the day the tech was support to turn up, he gave me a call saying he does not have the panel to do exchange so requested me to just send him picture of the image problem and invoice so he can use the photo as prove to indent for part. BTW, i had a very hard time taking the photo as prove since can only see on bright white screen, thus everything is bright on photo.
Waited for slightly over a week and received call that panel have stock and ready to do replacement. Did the replacement last week, now almost everything is brand new for the recalled power supply and panel.
Really very good services from LG, I had some worries about the picture defect which is common to OLED but with such services, i will 100% go for another OLED once the existing died.