Refund on my electricity billing

I sold my house in April and all transfers were done and Ethekwini Munipality was suppose to give me the refund for monies due to me on my billing.I went there and filled the necessary forms and I was told to wait my refund will be electronically paid at the end of August,toll to date iam waiting for that refund.When I call their Durban branch in Florence Mkhize iam now sent from pillar to post and they would drop the phone after me having hold for more than an hour using my airtime.I have called them more than 4 times as we speak.