“…Most current literature defines CCs as the physical station that allows an organization’s customers to contact them by different communication channels, such as telephone, touch-point telephone, fax, letter, e-mail, web, online live chat, and social networks. These communication channels have been studied in either a conceptual or an analytical way, for example: e-mail (Legros et al , 2013; Gupta et al , 2012; Li et al , 2012; Jolai et al , 2008; Malik et al , 2007; Nenkova and Bagga, 2003; Rodenstein, 2004), telephone (Murphy and Cerqua, 2012; Ali, 2011; Byrd et al , 2008; Millard and Hole, 2008; Balakrishnan and Munisamy, 2007; Koole, 2004; Armony and Maglaras, 2004; Lewis et al , 2002), instant message (Luo and Zhang, 2013; Sparks, 2012), live chat (Sparks, 2012; Mehrotra, 2003; Padmanabhan and Kummamuru, 2007; Steul, 2000), and social networks (Acharya et al , 2013; Burns and Friedman, 2012; Bordoloi et al , 2011; Schuster et al , 2011).…”