 AT & T acquired TCI in 2000 , inheriting its agreement with CSG . AT & T alleged CSG was not abiding by the contract 's terms to provide favorable rates . A legal dispute between the two companies began in 2001 in arbitration court . Before the dispute was resolved , AT & T Broadband was acquired by Comcast , who wanted to use its own billing and customer service vendor . In October 2002 , a judge ruled that CSG owed Comcast a $ 120 million refund and that it had to reduce its prices . The two companies disagreed over whether the ruling would allow Comcast to halt their agreement before the end of its term . CSG and Comcast reached new agreements or extensions in March 2004 and in 2008 . In 2014 its work with Comcast was expanded to cover all of its customer support and billing for residential services . 
