@LALR_ParserEven if they're having some HQ in the Switzerland they also have branch offices in Germany and the UK. Also the DICE HQ is in Sweden... so maybe it might be worth to ask the ECC to assist in these countries... I for my part have still my running GDPR request. Not that many days left till they've to deliver. And also opened 2 cases with our local consumer protection organisations. The one responsible for the state I'm living in and the other in the state EA has it's german offices in. Might also give the ECC a try as they're also represented with a contact in Germany. But maybe it might be a better idea to contact the regulation centre of the european union as the ECC is an independent organisation. Just found https://ec.europa.eu/ which is an official site provided by the european government.
Edit: Can't you just use ECC for filling your complaint to EA Germany ? This office houses a number of different business groups, including Publishing, EA Mobile, Development Services and corporate functions such as Finance, Technology and HR.