I'm not sure that "rights and redress" is quite the place to put it - but would a sticky thread be useful to let people know which of these various bodies is best for what topic, and how to get in touch with each? Do I see any volunteers to start such a thread?
Super idea, this is a very confusing and frustrating field. Maybe if you just start the thread as people add to it the original post can be updated with contact details for these entitities? It could help to hear people's feedback on how useful or receptive these entities are.
Yes, Trading Standards are passing themselves off as Consumer Direct now, but everyone still calls them Trading Standards, not least of all because that is what they actually do, apply and enforce Standards. I have found them very helpful. Usually in the first instance they advise you of your rights and tell you to write to the company
CEO▸ raising the exact issue, or category of issue, that Trading Standards have identified for you.
Also, on the original topic of this thread, I did ultimately get replies by email to each issue I raised by email with
FGW▸ , but sometimes several days later, and often without any initial acknowledgement of receipt of my email to them. So if it is serious, do what Trading Standards advised, write a physical letter to the CEO and send it Recorded Delivery (costs just ^1.40 at time of writing).
Also, advertising on websites is, from March of this year, covered by the Advertising Standards Authority (ASA) and it is free to complain to them, you just send them evidence of the advertising and state what you think is the problem with it, but the response is not likely to be rapid. But it can lead to ads being modified and a judgement against the advertiser being made public for all to see.