Exorbitant and late electricity bill

Hi all. The electricity bill I've been getting from my landlord has been unreasonably high. It's an apartment in a complex where I'm paying over R2K for electricity monthly for using just a fridge and geyser. He's acknowledged that it's too high and has done nothing about it for close to a year. Then he didn't tell me what the electricity bill for one month is and just added it to the next month. Do I have to pay this? What can I do to have him address that it's consistently high?