Therefore, this study tried to assess and analyze the existing practice (quality) of prepayment customer service both from the employee and the Corporation’s perspectives, and thereby propose possible marketing strategies that are capable of improving the customer service quality for the subsequent adoption of prepayment service. SERVQUAL, as a methodological approach to service quality measures, was employed to measure the prepayment service quality by comparing customers’ perception of the received service against their expectations. Accordingly, the study revealed, despite its limitations, that there has been a substantial gap between customers’ expectations and perception of the service rendered, for which different possible marketing strategies were suggested for improvement.