Keep on them with the GW. Personally, I would EMAIL several of the top execs until something is done about it.
Speaking of EQ...When I was knee deep into my credit back in the 2000-ish, EQ was always the worst of the three big CRA's. Having gotten back into the swing of my credit again, I've noticed that not a lot has changed with EQ. They still lag, are last to report anything, resist removing erroneous information (especially personal info/addresses that do not belong), report erroneous & doubles of same lines (especially if they're lines that hurt you) and their automated ID verification system is riddled with issues which leaves a lot to be desired. Overall, I don't think very highly of EQ. The only time I seem to get anywhere with them is when I call them directly and SPEAK with someone. I know, wild....but that's been my experience.
When it comes to EX, I find that the best way to dispute the kind of information you're speaking of is through the mail, not online. Online is good (with EX) for minor personal info items such as addresses, etc. But when it comes to the derogatories, USPS certified mail with a clear/strong demand letter usually works on the obvious problems.
Anything goodwill related, I always open with an EMAIL letter to at least 6 of the companies executives all at once. The problem usually goes away within a week or two on the outside. That has been a 100% effective method for me. I will note that when I say goodwill, I am speaking of an item I want removed regardless if it's my fault, their fault, correct, incorrect, etc. Just want it gone. They usually see that I've figured out how to contact all their high level execs and they want me to go away.