should i let them hate me?

I am very partial to the spinach pies produced by a bakery not far from home, which is run by some men who clearly are disgusted every time I come in and try to partake of their wares. At first I thought I was just oversensitive, but slowly I have come to be of the opinion they wish I would die. They seem to try to get rid of me by always trying to sell me something other than that which I ask for, or to heat it up or, as happened this morning, charge me a dollar more than the advertised price.

I have tended to assume in my multiculturally tolerant way that since they run a shop and take my money, and I really like their product, that I should feel happy to go in there whenever I please and make purchases from them. But should I oppress them in this way with my money and wants? What do you think?