Incorrect Billing

I'm disappointed & appalled at how CP treats their pensioners. My parents are both pensioners & have installed a prepaid meter in January 2015 but they are still being billed for normal meter. How is that possible? When they enquire they are told that they can see they use a prepaid meter BUT they must still pay the normal meter that they being billed for or they will cut their electricity. Tell me CP where are you getting these readings that you are billing from because no one has come over to read the meter that no longer exists? I'm shocked at how you ***** money from pensioners! My father has been making up & down trips to CP with no joy. KB & SM Mavimbela Account number: ***. Feb R604.34, Mar R830.30, Apr R725.47. I want this money refunded to my parents ASAP so let's discuss when & how it will be refunded!!