Management of telephone call centers for others; operation of call centers and customer service centers providing telemarketing for advertising and sales purposes, scheduling appointments and reservations, consumer surveys and market research, responding to business inquiries via telephone for purposes of customer service and customer relationship management, on behalf of others; management and operation of customer service centers via telephone, text, email, and online chat; providing call center services, namely, appointment setting and reservation services, inbound and outbound communication services, and customer service; providing contact center services via text, electronic communication and voicemail