Rental bad experience

Bad experience .it started after 6 months of my lease started .Rent always came high with hot water charges and water overcharged. At 1st l thought maybe we using too much water only to realise that we not as its just me ,my wife and 2kids under 3years.whenever our rent slip came the building manager had to return it back for review and still it will come back high again.This month it came to high a bachelor flat R5200 which is ridiculous as my actual rent before adding water,sewage,security is R2100 .I took the slip back to the building manager again he took it back and brought it back on the 15th ,Still as high asked him politely if too him does it make sense and he said no .The slip was taken back again ,sent email no response and still now waiting for the slip .My worst renting experience ,so disappointed.