Capital Billing Service Fraudulent attempt to collect a "debt" Los Angeles California

I recieved a letter in the mail claiming I owed $898.00 to a company called Readers Clearinghouse.  After many attempts I finally was able to speak to somebody at Capital Billing Services who stated that I had made a verbal comittment to receive magazines for 5 years, had made several payments and then stopped paying.  I have never heard of Readers Clearinghouse and never made any commitment to subscribe to 5 years worth of magazines.  

I have never recieved any communication to include mail, phone call, or electronic communication from any company named Readers Clearinghouse.  If they can send me magazines you would think they would be able to send me a bill.  After searching the internet I see that there are numerous complaints which are almost identical.  They have threatened to report this to Credit Reporting Bureaus and seems that their main intent is to falsely intimidate consumers into paying debts that are not valid.  I will file an official dispute of this charge as I am not a party to extortion and theft.