1st things 1st, you're lucky. No etailers will let you collect after hours or on weekends. I assume you collected the monitor from Rune as he generally meets clients there over the weekend so they can collect parts ordered during the week. Also Alex was at the office till 17:48 so I'm not sure how you arrived at 17:30 and no one was there....
So Rune already took time out of his weekend to meet up with you so you could collect you monitor and you still feel you somehow qualify for discount or a free item...
