The CBE Group, Inc review: Collections attempt - fraud

I received a letter in the mail regarding an amount in collection from Ebay (which I have NEVER done business with) with a reference number. The phone number listed goes to an autobot that tries to confirm the caller by a phone number (which it couldn't do), then asks for the reference number. You CANNOT get to a person. The letter also states that you can dispute the debt by phone or by writing (electronically) and if you don't do it within 30 days, they will assume that their information is correct. They say you can include supporting documentation, but there is no way to attach it. My understanding is that Ebay takes their share of a sale when a sale is made (2-3%). They don't issue credit or credit cards, so this would appear to be more fraud (disheartening to someone who has been dealing with identity theft). I will be calling the better business bureau.