Bad service

I need help, actually I need someone to help me understand. How are meter readings done in these properties. I stay at the Unison in Randburg, Ferndale. And I'm so amazed by the bill that keeps getting sky high and yet there's no one in the unit. Hai I'm really confused. I'm so not impressed with the level of service in that place I wouldn't recommend anyone to stay there. Funny thing I was there from January to the 6th of August. Bill has been been 5000 something and I stay with my fiance. 6th August I left in the morning. My fiance left on the 15th morning of October and October bill was 5 thousand 5 hundred and some change. I enquired about instead was told the would be a charge to our unit cause there's a complaint about ******* left by the door. I then rep**** to their email I advised them no one is there so ******* at the door can't be us. I asked for it to be investigated this was end October and to this day no one has gotten back to me. Now again end November I'm getting Bill which is 5 thousand 6 hundred and some change. And there's no one in our unit. I'm a very very unhappy tenant.....!!!!