Activation code problem

I went to game stop to buy a wow card and they instead gave me a activation code printed out on my receipt , problem is the activation code is a series of 19 letters and numbers but the activation code on the blizzard site is 16 xxxx-xxxx-xxxx-xxxx
How the heck do I input the code on this receipt
Thanks

Are you logging into the correct region?

Did you buy the game time for the correct region?

I didn’t know I had an option to log onto different regions

It’s a physical game time card? Does it have a scratch panel?

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Did you call that Gamestop and ask them how this works?