I'm so sorry you had such an awful experience. Hopefully there are other fabric stores in your area.
I feel kind of bad now, living close to one of the good Joann's and a clean, friendly Walmart. I didn't go into the Joann's for 2 years because of a car accident, and when I did go in the gal came from around the cutting counter and gave me the biggest hug, after mentioning to me she hadn't seen me in awhile, I wasn't going to mention it. I've been going to that Joann's since I was 10 (I'm 52 now), even though it's location has periodically changed. We joke they even put in the newer overpass over the highway so I could get to Joann's faster!
It's probably like a lot of places, only as good as the people they employ.