Complaint Review: Mineral Cosmetics LLC

I went to Jefferson Mall on Thursday, June 4th.  I had just come from a doctor's appointment and decided to stop at the Mall on my way home.  I visited one store and decided to go home.  Heading towards the exit at the the food court, I was approached by a young lady that I thought was very nice.  She pressured me into spending $424. 

I kept telling her I was retired and was on a fixed income, but she kept coming at me.  I realized that night that I was tired and vulnerable.  I went back the very next day on Saturday, June 5th to ask for my money back, but they will not budge.  I have not opened any of the products.  What can I do to get my money back?  Please help.  Thank you.