Not coming to repair their metre. - Consumer Complaint for Impact Meters

I have been in the new place for three months. I received a huge amount of R 1400 for the use of hot water. I asked for a technician to come check, the technician saw that the unit below me also runs on my meter.Me and the technician saw the next thing. As soon as I use warm water my meter ticks. As soons as the below unit uses water his meter ticks but also mine! So I get billed for both units water. I have been waiting a week for feedback from Impact I phone, and I email but they ignore all my msgs to come fix their problem. Spoke to the guy below me, this has been going on for 3 years! For 3 years impact has been billing previous tennants more than double what they should! They are very quick to send a invoice that needs to be paid before a certain time, but as soon as they have to fix their mistakes and refund people they do nothing! Where I am from this is a called a crime! They steal from consumers who work damn hard to earn their money just to be scammed by a company! They have no backbone!