A Big Fraud - Customessays.co.uk

I was so regretive to find this website later. i put an order for 15,000 MSC degree dissertation on the "CustomEssays" on . i suffered a lot. after 3 hours i transfered the payment. they called me and gave lots of garauntes. but after several days , i called them . they complained that it was my fault to put a wrong order . and they only got 4 pages from the writer. they started to pay more and more. this time, they gave a link to sent money to "SWREG" in USD. i felt a bit strange cause one is 450 pounds and the other is 760 pounds. luckily, 760 pounds exceeds the limitation of my paypal account. i just sent 450 pounds but add VAT 570 pounds totally.

now they rejected to pick up my call and made a lot of stories. i asked for refund but they said the money has been refunded yet in their records in the system. but i don't believe.

i will call my credit card company to get refund!!

can some friends here tell me how to deal with the credit card company about this problem?cause they have cancealed my order and deleted all the messages on that website. only i have is some messages from email.
thank you and looking forwards to your reply!!