Dead Pixels g5 5590 and no g-sync

Hello,

I bought in july a g5 5590. I waited near of one month for get it when website told it s will be delivry within 1 week. One week after i seen i got one pixel dead in screen and i seen than the screen doesn t support gsync...

Two days ago i got a second pixel dead.... what can i do about it?

Thankds