Bad customer service - No electricity for a few days

I have had no electricity since tuesday the 15th of Jan 18 till today the 18th of Jan 18. I have called City Power to come and assist me. Their Technicians came and said that they found nothing wrong even thought they could see that there was no power in my flat. They then closed my call and said the issue has been resolved. I tried calling again but i cannot get through, i even sent an sms regarding my issue. I stay in Ridgeview flats, fleurhof, flat no. 22 and would appreciate if you can assist me in resolving this matter. The technician have no customer care and they are uncaring about this situation.