Its not like he is the only VW dealer/salesman in the country. if they don't come back to you, they don't want your business, so move on. They aren't the cheapest anyway so not sure why you bother with them.
Plenty of fish in the sea and places to buy cars cheaply, my 3 local dealers didn't get more than 20 mins of my time on price, but the dealer in Colchester wanted my business so job done...
@ Monkeyhanger your scenario reminds me of this
https://www.youtube.com/watch?v=B2LLB9CGfLs you sure the canteen wasn't upstairs

I love it when they walk off to speak to someone, i never believe it, but i think it happened to me last new car too...