To take action vis-à-vis the European authorities, we must understand the one hand the functioning of European institutions, offer the other pleas actions or citizen arrest at European level.
>>> OPERATION OF THE COUNCIL OF EUROPE
>>> DEVELOP ADVOCACY
>>> INTERPELLATE DIRECTLY THE EUROPEAN COMMISSION
Although already enshrined in 2007 in the Treaty of Lisbon, the possibility of directly interpellate the Commission for a group of citizens (with a minimum number of signatures, a number that varies from country to country) is possible only since April 2012 .
The Europe page that explains the arrest and complaints procedures : http://ec.europa.eu/atwork/applying-eu-law/complaints_en.htm