Is there a private/governmental organization in Germany similar to the US's Federal Trade Commission (FTC), which can take actual authoritative action should a company be misbehaving. I'm familiar with https://www.vzhh.de/, however this seems to be only a complaint repository and advisory organization (Like the Better Business Bureau - BBB- in the US.) They can't actually do anything to fix the situaiton, and the companies simply don't care if they have bad reports there.