Magic Mart

i went shopping for the very first time at the local magic mart store and purchased a woman's jms bra only to bring it home and find out it is the wrong size. When i called the store to find out if i could come and exchange it,they told me no! They are going out of business and i was a day late. There were no signs on the doors,at all about the store closing let alone exchanges or refunds. I am very aggravated at this point. What am i supposed to do now, I want to be able to exchange it,that was all i wanted, now, i want my money back.....