New development on my monitor replacement: Dell have called me and insisted they cannot replace the monitor. They said that it's because sales channels and support channels get different inventory pools. That's probably the first time they've been honest with me. I expressed my frustration that they are sending out new monitors to people who were behind me in the queue and have not yet paid yet are refusing to replace my monitor, plus at least some of those new customers will get broken monitors and those won't be able to be replaced either.
Long story short, I got a broken monitor and am now getting a refund because Dell prioritise new customers. I'd be very cautious trying to buy this monitor now. If you get a dud, you're not getting it replaced.