No monthly statements from Citiq and tenants complain of expensive electricity

Citiq Prepaid 'manages' seven prepaid meters for us in George. Our tenants complain that the units they purchase through Citiq are much more expensive than the municipal tariff. Not once have we received a detailed monthly statement despite several requests. When we asked for the names and e-mail addresses of the CEO and financial manager of Citiq, the call centre operators say they are unable to provide these. Should we approach Nersa?