I just bought an xbox live card from online and it says I don't?

I logged in on the xbox.com/live website and chose join xbox live, get gold now, and gold - 3 month. I confirmed the purchase and it's like thank you and all on my email, but when I try to join a friends party it says I can't because I nee a gold membership. Like wtf? I turned off my xbox off and then back... show more I logged in on the xbox.com/live website and chose join xbox live, get gold now, and gold - 3 month. I confirmed the purchase and it's like thank you and all on my email, but when I try to join a friends party it says I can't because I nee a gold membership. Like wtf? I turned off my xbox off and then back on, tried signing out and then back in and it still won't work. What's going on!? It's on the right account so I don't understand...
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