United Cash Advance Claims I owe money deposited in my account by an on-line lender. Some named Paul called unknown California

I received a telephone call from someone named Paul from a United Cash Advance who said I owed money to a payday loan company and that I was being sued. He said that he was the collection agency from the company I had supposedly borrowed from. He was fast-talking, not allowing me to say anything. He asked if I had an attorney to represent me because I had defaulted on the loan. He had my address, my bank name, and the last four digits of my social security number. He also said he had a copy of my credit report and could see that I was a dishonest person. When I asked  him who I borrowed from he said "United Cash Advance". I challenged his response and he became belligerent. I asked how much money I had borrowed and he hesistated then said $300. I asked him for the date and he said it was "several months ago", but could not give me specifics. I told him I knew the call was a scam and that I would report him to the BBB and FTC. He then said he would call the sheriff in my city to issue a warrant for my arrest. I told him I would see him in court and hung up. The number he reluctantly gave me is 855-213-8326. Beware the these types of consumer fraud scams. I closed my bank account and opened a new one as a precaution.