Art Platform NYC Art Representation Scam, No Signed Contract NY New York

I received an email from Juliette Townsend on 21st June this year that Art Platform NYC would like me to join their project called "VISUAL THOUGHT: Art & Expression" . She was so excited to know more about my work and delighted(what she said) that all the staffs are unanimous that my work would be an excellent addition to the project. And she made my profile page on the site the very next day.(without telling me that she would do. I had sent her iphone images which were in poor quality) Everything went so fast and she was so in a hurry to make me sign the contract and make a payment.

She sent me emails 1 to 2 times a day. But after I made my payment(950$) on 24th June(just 3 days after her first email), She started to slow down. I sent my proper images for my profile page but she didn't reply, after few days she said she didn't receive the images. I sent her again but it is never updated and even more my page does not appear on the site.

After receiving emails from other artists who have made contract last year and received nothing promised, I asked about this to Juliette and my page was gone like other artists. She said my page is still there and sent me a link. My page was only able to be seen through that link and no one could find my page from the Art Platform Site. 

I also claimed that there's only my sign on the contract, no one from the Art Platform signed the contract, that the contract is not valid that I want to hear her explanation and I want refund. Also I asked her to tell me who's in charge of the Art Platform NYC so that I can speak with him(her).

Paula, the account department staff responded me that she cannot comment this. Juliette emailed me there's nothing more that can be provided about my inquiries. They are both not answering to my email since then.

Also my credit card was charged 47.5$ on 5th July(11 days after the original payment) without any permission or reason. I emailed Paula and she did make a refund about this one payment, but I know that many other artists are double or multiple charged and not payed back. Paula and Juliette are claiming that the multiple chages were system problem(system that automatically took 500$, 47.5$, 150$, 300$...etc by mistake). When I asked Paula the prove of the cancelation of 47.5$, screen shot with name of the person in charge, she sent me a screen shot with my name only.

I've never seen their names on official contracts. Too many artists have lost their money, time and energy. I'm hoping no more artists get involved anymore.