Scamming additional money that is not due to anyone

I want to report Regional Yellow Pages Online for trying to scam us by telling us that our account is past due and they are turning it over to a collection agency trying to collect $499.99 after we have already paid $479.95 on 2/18/10.  We owe no more money and we want to staop being harrassed.  Their address is 1320 State Route 9, PMB-9477, Champlain, NY 12919-500, telephone number is 866-965-1730 (although NO ONE EVER ANSWERS becasue it is a SCAM), their email address is accounts@regionalpages.com.  Please report this to whatever agency needs to be contacted about this.
Thank for your help and consideration.