The EU is not a state and therefore typically you cannot directly sue in its courts.
In most cases (such as this) a national court refers the case to a european level if european directives and interests are involved.
Fun fact: the EU commission/parliament has also not the power to pass any binding laws. They pass directives which are than implemented into national laws by the legislative bodies of it's member states and can also be overthrown by courts of each state individually (e.g. happened in germany with EU data preservation directives)
