It might be worth trying some other shops in your area... Honestly, if you have any high end cigar/tobacco places, some of them have started carrying vape equipment and they can be more professional about things. How much the owners may know about vaping is debatable, but it's a different kind of environment.
If you have a Freedom Smoke USA near you, it might be worth a look. They've gone somewhat national, they're kind of "utilitarian" in approach and as are their juices (not bad, not good, just decent) and I think they have something going with Kangertech, they carry a lot of that equipment. I will say, a couple near me have decent employees and I've gotten "help" there before, but as CMD-KY states, I now do most of my vaping orders online, and I DIY juice, from wholesalers, and buy my equipment online, as well as using RTAs (rebuildable tanks) and it is rare for me these days to need the "aid" of a vape shop, usually if I have a problem, I can get the answer here.
I would like to support my local vape shops (the good ones) but I don't very much anymore. The savings are huge and I now know a lot more than many of the staff, many of whom aren't really trained much in e-cigarette knowledge.
I would never darken the door of a shop that asked me "are you stupid?" and I don't think you should either. I would try to do more online purchasing, and I have found ECF as a collective to probably have more knowledge than the majority of stores, period. Unless you have something exceptional near you, which isn't always the case....
Best of luck,
Anna