Dispatches' footage appeared to reveal that Viagogo used the credit cards to bulk buy tickets on the primary market, with the intention of reselling them back to consumers at huge mark-ups on its own site.
One of the company's employees was caught on camera labelling the practice "highly, highly immoral",
However, in a new Q&A in today's Music Week - with subscribers now - Viagogo UK director Ed Parkinson defended the company.
"That practice was really misrepresented by the programme," he said. "We have historically purchased a small number of tickets [this way].
"Predominantly, we offer customers a guarantee that if a seller [fails to] get them a ticket, we'll give them their money back or provide a replacement.
"Having a small number of tickets in stock helps us fulfil that guarantee. If they're not used they do get sold on - sometimes at a profit, sometimes at a discount."
Parkinson also defended the practice of taking thousands of new tickets from promoters and selling them to the public as secondary tickets - at sky-high prices.
"We've always taken the view that it's better - and we want to - work with the industry," he said.
Pick up Music Week magazine to read the full Q&A - part of a three-page special on the Dispatches programme.