Terrible customer service at Ethekwini Municipality regarding refunds

I am so disappointed at the terrible customer service that Ethekwini Municipality gives to its clients. I have been sending several emails to ********** email address with regards to a refund application for a property that I sold in May till today I have never received any response. I have been calling the call centre but the phone just rings. Saras Pillay who is the controller at the Eservices department also forwarded my emails to this revline email address. But I am not getting any response from that revline email or response from the accounts department. I don't know what to do anymore. ....I am not in Durban and cannot go to the offices myself.