The logo of Britain's Channel 4 televisi

London, UNITED KINGDOM: The logo of Britain's Channel 4 television station is pictured at the company's headquarters in central London, 18 January 2007. Carphone Warehouse, the main backer of Channel 4's reality television show 'Celebrity Big Brother,' pulled its support Thursday as complaints about alleged racist bullying spiralled and criticism mounted. Mobile communications retailer the Carphone Warehouse said it had told broadcaster Channel 4 to remove its name and branding from the programme with immediate effect, saying it did not want to be associated with it. But Channel 4 chief executive Andy Duncan said Thursday they "could not say with certainty" that the comments directed at 31-year-old Bollywood actress Shilpa Shetty were racist or whether they stemmed from "broader cultural or social differences". And he rejected calls for the show to be pulled off air. AFP PHOTO/CARL DE SOUZA (Photo credit should read CARL DE SOUZA/AFP via Getty Images)