Much more entertaining: Get the list of advertisers. Find the ones who aren't allowed to share your data with Facebook, e.g. due to lack of consent or because they're bound by professional secrecy (e.g. banks or health related things). Report to your local DPA.
When it comes to the UK DPA they will only even consider your complaint if you have evidence of trying to resolve the issue with the offending company directly, so it will not have the desired outcome because most companies will opt you out, removing your grounds to complain to the ICO in the first place.
