IDK Kuwait. I'd say take them to the store first and than call sapphire.
As long as Sapphire has a official retailer in your country you should get new ones.
Going to the store at 8 A.M tomorrow..
Will demand a replacement GPU and riser.. I'll play dumb and say I don't know about sapphire, etc..
"I bought these from you and now they're not working, you said 3 year warranty"