Sorry for the mistype, you've been banned for 6 days, not permanently.
The logs show that you destroyed and replaced 3 diamond blocks at a player's shop.
(http://i.imgur.com/YwkwSmJ.png)
(http://i.imgur.com/aHGY0eE.png)
(http://i.imgur.com/uqBuaXw.png)
If what you say about your account being used while your away is true , consider changing your password before anything else happens (being that this is your last chance before a perma ban).
You'll be able to log back in on the 11th.