Unable to see an option to buy applecare for new Device

I bought An Ipad in South korea while i’m from the USA, I was told by the premium reseller that i would be able to buy applecare from my ipad but i have no option to even buy it. all im told is it has limited warranty which is due in 1 year after activating device.

I went in store & was told the device isn’t in their system so they can’t purchase it either, & i tried calling apple support twice & still no help or option. i got the device 4 days ago