Data Billng ******* and poor customer service

3 months, 20 phone calls, nearly 4 hours of talk time to call center agents, team leaders, 6 promises of 'we will call you back with an answer by latest tomorrow and NOTHING! Absolutely no calls from anyone and nobody in their call center can give answer clear answer as to why you being billed for Data. Several complaints logged by the agents to the 'correct department' and nearly 3 months later there hasn't been a single call from anyone at MTN. Disappointing and poor service!