no documents, demanding payment

I GOT A CALL FROM THE COMPANY CALLED MSA AND I WAS INTERESTED IN WHAT THEY HAD TO OFFER, THEY PROMISED TO SEND ME THE DOCUMENTS AND I ARRANGED THE PAYMENT TO START ON THE 29JULY 2015 I HAVENT GOTTEN ANY DOCUMENT AND THEY WANT TO DEDUCT THIS MONTH jUNE.I DID SEND THE SMS AND AN EMAIL STILL NO ONE GOT BACK TO ME I AM NOT HAPPY WITH THEM AND THAT LEADS ME TO WANTING TO CANCELL