The Federal Trade Commission has filed a lawsuit against a ticket resale company, alleging that it used illegal methods to secure tickets and resell them at inflated rates for popular concerts, including Taylor Swift’s Eras Tour.

The US Federal Trade Commission sued ticket reseller Key Investment Group for evading purchasing limits to buy up thousands of tickets to live events including Taylor Swift’s Eras tour and resell them at a markup,

Key Investment Group said the FTC is misapplying the Better Online Ticket Sales Act, a 2016 law which it said was meant to target malicious software, not legitimate resale businesses. Key Investment Group sued the FTC in July to try to prevent the agency from using the law against it, saying it uses human employees — not bots — to buy tickets.