teokolo - 1:36 am on Oct 22, 2011 (gmt 0)
An update on this issue.
Today we had a drop from position #4 to #12 and after some hours we received this email (I try to translate into English):
it is a long time we're linking you from banned websites and at last we have been able to make you disappear from the 1st page. Something worse is going to hit you!
Since SERPS are changing quite often (lot of spam websites around) I'm not sure our rankings dropped because of this kind of spam, but they confirmed they're trying to damage us.
Should I try to contact Google (using reconsideration request form maybe) and explain the situation?