2407 Support Problems

Hello all, I recently bought a Dell 2407 revision A04 from Overclockers.co.uk. When it arrived, I was very happy. However, after booting it up, I found 1 stuck, adjacent pixels shining bright green into my face from the centre of the screen. Knowing that where was a standard on the number of dead pixels needed to warrent a replacement, I called the Dell Support line as provided from the UK website, hoping that they might be a bit more sympathetic what with the pixels be adjacent and in the centre of the screen. When I got though to a person, they asked me for the system code number thing, and I said it was a monitor. He immediatly put me though to someone else, who was very helpful, but said they needed 5 dead/stuck pixels to replace the monitor. Downheartened, I got on with learning to cope with a £500 monitor with a big green dot in the middle. fast forward 2 weeks. I get a yummy new graphics card (8800GTX) and switch to DVI input. To my horror after putting a DVD on to test, the screen starts flickering blue, and i thought my card was damaged. tested another DVI monitor.... it didnt happen. tested the 2407 with a different DVI cable.. thought it fixed it, then it starts flickering again. switch back to VGA (DVI-VGA connector on the card), movies work fine. no graphical glitches. boohoo, damaged monitor. woohoo, kill 2 faults with 1 stone. Phone Dell. No service number, its a monitor "ok, please tell me the serial number, beginning with CN" so i did "that is not a system serial number" "no, its a monitor, bought from a 3rd party, it wasnt with a system" "nothing we can do sir" this is the abridged version. see a difference here? where is the call divert? i called the same number both times, lady on the phone was trying her best, but she couldnt help. I asked to be diverted to the proper number or department, but she was convinced that there was no other person/people who deal with this. She said contact the 3rd party seller who send me directly to dell in the first place. I am running the monitor at 1920x1600, 60Hz. Anyone got any ideas? I wanted to get this monitor changed before my next LAN party, but it doesnt look like i will. Apoligies for the long post, I've just reached the end of my patience, and I though a backstory was better than "DELL UK SUPPORT IS RUBBISH KTHX"