Selling Never Worn Mary`s QUEEN Dress

I just bought the Mary`s Queen dress (I can e-mail the pictures). It is a beutiful dress but when I tried it on I didn`t like the way it looked on me. I look much better in an A-line dress. So I changed my mind and want to return the dress. The dress is still in the store but is paid for in full. They won`t refund or exchange the dress for me. It is a size 8 and is white/silver. If anyone is interested please let me know. I paid $1000, with the queenie hoop and would sell it for $700. If anyone is interested please let me know.