@fibonacci, is it the same company who you have an interview with on Thursday? Are the people emailing you the same ones you'll be working with? I've no advice, sorry, just wondered if there's hope that the people you work with might not be so arsey.
I have a job hunt rant of my own, I had a call at the end of last week, from traipsing round town and going in all the businesses, Poundland rang to say they were recruiting and will be holding interviews at the jobcentre, and arranged one for me for today, long story short, the interviewer made me felt very patronised and made me feel stupid for applying when I've no experience, he asked why I wasn't applying for nursery nurse jobs as that's where I'm qualified, that it made no sense for me to want to work in a shop, I ended up fighting back tears when I left the room. Feel really stupid for letting him upset me. Tomorrow's a new day.