Times are really hard right now, no matter where you're at.
Considering there are 30 people covering one area, that's a lot of sellers in one spot. Have you thought about maybe expanding to the next closest town/neighborhood/area if its not too far from you?
When I was in elementary school a student at my school had a mom who was an Avon lady. I would always get ads from just HER. It's as if she owned the Avon turf there, so yeah it's pretty hard for others to get in.
In your advertisements have you mentioned anything about winning prizes? Like if you had certain items that you could spare you could maybe use that as a prize to lure some customers in. Now I'm not too familiar with the company your working for but maybe you could also make it like a ladies night in instead of out where besides just trying to show and sell your merchandise, they could do facials and nails? That would def seem fun for me.
As for your boss, sorry but she sounds like a bitch. Yeah I know that the economy is bad and businesses are trying to get as much business as they still possibly can. But there are some things that are totally out of your control. Like you can't help that there are so many other sellers selling in the same area as you, you can't help that your friends and family don't really have the money at this time to help you out. It sucks but with the way things are going these days, it's really hard for everyone.
I had thought about selling Avon or Mark products but decided against it cause I just don't have the time and energy and resources for it. Plus where I live there isn't as much of a demand for their product as there is for stuff like Dior, Chanel (I'm a poor girl living in a richer area).