YELLO PAGES CANCELLATION

WE ARE TRYING TO CANCEL TWO CONTRACT FROM THE YELLOW PAGES. THES CONTRACTS JUST APPEARED ON OUR TELKOM ACCOUNT. WE DID NOT ASK FOR ANY ADVERTS AND SERTENLY DID NOT SIGN ANY CONTRACTS. I CANNOT GET HOLD OF ANY ONE AT YELLOW PAGES. THE EMAIL ADDRES *** DOEN NOT EXCISSED!! THE PHONE NUMBERS THAT I GOT FROM TELKOM DOES NOT WORK. THE OTHER PHONE NUMER THAT I GOT FROM YP SITE JUST GOES ON A RECORDING AND NOBODY ANSWER! I AM REALLY DESPERATE. WE ARE PAYING FOR TWO CONTRACTS THAT WE DID NOT ASK FOR AND DONT NEED. WE ARE A SMALL COMPANY AND DONT NEED ANY ADVERTISMENT. CAN SOMEONE PLEASE ASSIST US URGENTLY?