absolutely horrible

I wish I could give a Zero rating ,I reside in Boksburg and rent from(Zelri Properties ) phoenix House ,Earlier this year we were still using meter mate ,end of February we received a email stating we should register with Ismart or our lights will be cut ,upon doing so our balances were already in a negative -R1500 mind you we had no idea about this prior to this email being sent ,we had to pay that outstanding amount including a registration fee ,I top up almost every week switch off the main switch before leaving for work every morning yet my bill is always in a negative this is insane I spend more on electricity then I pay for RENT!!