Re: "commissioner asked complainant to provide further details of any complaint they had made"
"to take action on your behalf"
Ultimately it is supposed to, but only after you've given the other party an opportunity to redress the wrong first. I'm not a lawyer but that would appear to be a basic principle of tort law.
However this report from NOYB about a supervisory authority's response to complaints (admittedly in the EU) is rather troubling. I've experienced something that seemed rather similar on occasion here in the UK.
Biting the hand that feeds IT
