SEOUL: South Korea's under-fire football association has apologised over a series of controversies ranging from accusations of using unfair practices to appoint a coach to allegations that it provided sexual entertainment for foreign referees. The Korea Football Association (KFA) has been under heavy fire since South Korea crashed out of the World Cup at the group stage, despite high expectations for a "golden generation" captained by Son Heung-min. Then came the allegations of foreign referees being provided with sexual entertainment in 2011 to 2012. Social media users have since circulated a list of foreign referees who officiated South Korea's matches during that time. The KFA's apology said many within the association had been "unaware" of the incidents, but did not deny they happened.