Incorrect water levi charge

I have been staying at newgate flats unit 333 since end of February... I have on average paid less then R100 for water per month that is excluding hot water which also average around less then R100 per month. Now end of August i got a bill of R1889 i had to pay for water and thats not including hot water which was billed for around R70. I was billed R1889 for water...i stay alone,seldom get visitors ,have no leaky taps or bath i use my electricity en water responsibly. I have phoned afhco , went to afhco House i have asked to speak to the person in charge of utilities so that i can get an explanation as to why all of a sudden i am charged with such an enormous water charge...i was send from post to pillar. On the 5th September i went to afhco again and demanded a response to my query. I was told that i would pay a portion of the amount...it was also e mailed to me. Now today 17 September i get an sms stating i am responsible for the entire amount of R1889 for water charges. HOW IN THE HELL CAN A SINGLE PERSON USE SO MUCH WATER. I DONT HAVE A SWIMMING POOL OR A SALON OR A LAUNDRY IN MY FLAT. ARE YOU PEOPLE SO MAD TO CHARGE ME SO MUCH FOR WATER????YOU ARE EXPLOITING ME NOW. I DEMAND ANSWERS. I AM GATVOL OF LIES