I went into the Vodafone shop last week to ask about my phone bill and I had to talk to a slick indian guy - he kept saying "by the looks of this you need the more expensive package" and things like "I'll just upgrade you to the more expensive package because you need that". I had to keep saying "no, I don't want that". I said "I don't want the more expensive package, I want to stay on the one I'm on" and he shrugged and said "well, it's not that much more expensive, so I'll put you on it now" and I had to just keep repeating it.
Also in the shop I work in we let entrepreneur type people set up stands to sell people things in the entrance, and some of them were trying to sell perfume sets to passers by for £30. The one guy kept bothering us (the staff) and trying to sell it to us too. I said "I don't want it, I can't afford it, have noone to buy it for" and he kept arguing with me saying "Even if you don't have a girlfirend surely you have a mother" and "you have a debit card don't you".
Also, I think he was trying use some kind of neurological programming to hypnotise us. He kept repeating phases in a soft voice and copying my movements. That's why I didn't look at him and ignored him.