I think that my traffic drop is related to the notice, because I stopped growing up once I got the notice, and then I started to dropping positions for my main keyword.
On the other hand, maybe I have deleted some good links that have dropped me some positions. Is very hard to detect what google interpret for unnatural links...and if you make lot of mistakes, it can destroy your website.
About the disavow links, I think this is my problem. I can not contact to the webmaster of these links. I tried to call them and no answer...If google is not counting them as removed links.. I think that I have a big problem... because there I have a lot of "unnatural links". I think that I have to insist about it in my next reconsideration.