No monitor experience but had to claim when my laptop screen got a load of black marks in it from something breaking up. And it needed a new case as most of the holes had been over countersunk at the factory so were stripped and some screws had been glued in!
First guy from getronics (company they use for on site warranties) turned up in an old banger full of dell boxes and food packaging and his clothes covered in food stains. Despite the alarms going off in my head I let him take the laptop apart but had to go out for a walk so I couldn’t watch. When I got back my laptop was in pieces and he realised he had the wrong chassis and the new screen was broken. When he put it back together with the old bits he had managed to corrupt the OS.
He offered to fix it. I told him to leave.
Next guy met me at work to do it. Also from getronics but this guy turned up with all the bits neatly in his car. He set to work in a tidy manner and did it all very quickly and left me with a fully working laptop.
The same fault to the screen occurred again a few months later. I didn’t bother getting it done again as it will just end up as my data logger laptop soon.
Hopefully they will either swap it out for you or send someone like guy 2!