Soho Boutique Brooklyn NY

Please be aware that the Soho Boutique located 1117 Quentin Rd, Brooklyn, New York, sells second hand stuff.
Please be aware that the store sells second hands clothes, so check the clothes before buying, I know it from my bad experience.
I bought the dress in the begging of May there, within 10 mins, I find the one I like and the salesperson helped me to zip it up I liked the way it fits me and I paid and left. I did not even think about checking if it was clean. I was sure that this store sells only new clothes. The party I have to go to is two months away so I put it in the closet and was happy that I found the dress so fast. Then couple days ago I wanted to take the dress to the tailor to alter the length of the dress and notice that the dress is dirty with oil spots. I went to the sore and asked them to clean the dress themselves, because I was not sure that the cleaners can clean it and to be honest, I did not want to pay extra money for the dress, I never could imagine that the store can sell dirty clothes.
The salespersons were so rude and right away they told me that I am a liar and I did ware the dress and now I wanted to return it. I explained to them that this dress is only for a special occasion and that occasion is only in July and I did not want to return it, I just wanted them to clean it. I was told that they need to talk to the manager and they did but so I cannot hear the conversation. After the conversation with the manager the salesperson told me that I wore the dress and they cannot accept it, even though I did not want the refund. When I asked to talk to the manager myself, I was almost told go to ***