Bad customer service from the City of Cape Town

Good evening. I reside in Nyanga and loadshedding was scheduled for 18h00h00-20h00. Electricity came back few minutes after 20h00 and it went off again. I tried contacting them via sms and they responded with a reference number saying that they've logged a service request for "No power." I was then asked to send my address and the meter number and no one came back to me. I've been sitting and I really don't know what I can do in order for them to do something about this situation.