“STRATEGIES TO REDUCE CUSTOMER COMPLAINTS AT A TELEPHONE SERVICE PROVIDER IN THE KINSHASA REGION, DEMOCRATIC REPUBLIC OF CONGO”, SJBEM, vol. 3, no. (1), pp. 50–76, Jan. 2014, Accessed: Jul. 27, 2026. [Online]. Available: https://mail.singaporeanjbem.com/index.php/SJBEM/article/view/107