cant redeem minecraft java code

I have bought a redeem code form a convenience store,but when I tring to redeem it.The web said 

WE'RE SSSSSSSORRY

We can't find the page you're looking for.

and I go to the redeem web form https://www.minecraft.net/zh-hans/

my code is 2f2tjv2tx2j247gqg3k33g6yz

pls fix this.I dont want to waste my money