United Cash Services, BIG SCAM,  never did business with them.

Scam they could not provide me with documentation of this loan

This scam/phone number went active on 03 March 2015.  If called, file a complaint with the FTC immediately.  The business is calling itself United Cash Services (formally known as AMG Services).  On April 2, 2012, the Federal Trade Commission filed an injunction in Federal Court to halt the practices of tribally-owned Payday Loan Companies which work in conjunction with AMG Services. Payday loan companies associated with the Modoc and Miami Indian Tribes are among those named in court records. The FTC alleges that the head of AMG Services, Scott Tucker, used his partnerships with Indian Tribes to shield businesses from state laws. - See more at: http://www.bbb.org/tulsa/business-reviews/pay ... h.1luQm7te.dpuf .

I received a call from this number this morning being threatened to be sued for three different things.  I never received a 1000 dollar loan from these people. They said I received the loan from cashnetusa.

If you KNOW you owe no money, or believe the call was from a fake debt collector, please take the time to read this:
http://www.consumer.ftc.gov/articles/0258-fake-debt-collectors