Municipality has failed our NGO for orphans

We have been insisting we have been billed incorrectly at 83 Hillbrow Street, Berea, JHB. The residence is under the Greek Orthodox Church. We have pleaded with municipality to investigate, instead of them sending someone, they continued to bill us for arrears. We then stopped receiving bills altogether. In a desperate attempt we installed a prepaid meter. We continued to get billed for electricity whilst we have a prepaid meter, we went to the municipality with the Arch Bishop &we spoke to Ms L Shandu ***) who promised to resolve this matter. We made a payment of R40k to municipality in Feb2015 & asked Ms Shandu to investigate the billing & give us a fair figure so that we could settle the account. To date ,She NEVER got back to us. Over & above paying for prepaid we continued to pay 1k-2k monthly towards municipality. On 28 Sept 15, an AMR representative came to disconnect our NGO's electricity stating we are in arrears yet NO-ONE can explain how we got to such a high bill. Our account is ***. This is very upsetting because we are not saying we won't pay, we would just someone to investigate our billing & give us a FAIR amount so we can settle the account.