The company that develop minecraft is called Mojang.
First of all, check the Minecraft Help Centre to see if your problem can be answered there (see related links below).
Alternatively, you can also send a support email directly to the Mojang headquarters in Sweden (see related links below).
However I should advise you that the support mailbox is flooded with emails. Mojang get a lot of timewasting emails such as requests for employment and spam. So don't expect a quick reply.
The best option, if your query is not answered in the Help Centre, is to make a support post/thread on the official Minecraft Forum where a player or member of the Minecraft team can get back to you.
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Nope :P
You can email Minecraft if you have any questions about Minecraft. That's what the Minecraft Help Email is.
webkinzhelp@ganz.com
I tried looking it up myself! Actualy you have to get the "Ganz" email address instead it's: info@ganz.org
You email the signed permission to the company. There email address is at the bottom of the permission slip.