Socailinworldwide.com Support@Socialinworldwide.com Took my money, deceived me, left no way to communicate Internet

 I got a Tweet about growing exposure to my small business from Social in worldwide.com claiming that they could bring more traffic and buying customers to my site than anyone else. For just $34.95 I think it was. They were having a special. So I paid the money through my PayPal account and filled out the form. Only trouble was, I filled out the wring web address by accident. So the next day I went to go find that tweet with the phone # and email, but it was gone! I sent them a return email from my form but it came back saying undelivered. .Now I find out these guys are scam artists and ate possibly going to be continuing to try to charge my PayPal account even more charges?! Wow, great. I don't know what to do next.