Gaming giant Sony PlayStation has turned to Linklaters to help fend off a potential £5 billion collective action brought on behalf of some nine million U.K. PlayStation users.

The company is accused of “ripping people off” by charging them 30% commission on digital games and in-game purchases made via the PlayStation Store, according to an announcement. The collective action, filed at the Competition Appeal Tribunal, is being brought by consumer rights campaigner Alex Neill, who is arguing that, by “unlawfully” overcharging people, Sony breached competition law.