PeopleByName Phone number reverse lookup service Internet

Signed up to look up the identity of a phone number that has been calling me.  The website advertises a "No Results, No Charge" guarentee.  

They, after around 24 hours, wrote that they were unable to find any information about the number I searched for, and gave me a CREDIT on their site for a future search.  Not that they were refunding my money, that they were leaving me a useless credit to re-try a service that didn't work.  Essentially, I am being charged for 1)A failure to meet their side of the transaction, and 2)An opportunity to gamble that they MAY be able to succeed on a future phone number.  As I have no ned to look up additional numbers, number 2 is useless.

This site is simply a scam to take money.  There is ZERO actual responsibility for them to even TRY to find the information, as they keep your money either way.  The results I received could have been accomplished by someone checking an email, doing NO research and replying that they were unable to find anything and the customer is welcome to try again.  Repeat cycle.