> then a company wrote him a letter saying he never borrowed from them (despite the paragraph before saying he did, in fact, borrow from them). Okay.
You misunderstood that paragraph.
He got a payday loan from an online lender, and paid it back promptly. The online lender was not Vista, the company to which his alleged debt purported to be owed.
*edited so I don't end a sentence with a preposition. I have no idea how by that slipped me.