Exorbitant utility bill City of Cape Town

I am a resident in Danarand and I do have an exorbitant utility bill form City of Cape Town which has a result from a leak in 2017. I had to make arrangement upon arrangement for the last 3 years making it a frustrated, tedious and just plain depressing. These people are ************s that is looking for soft targets and using ************ to keep us at ransom. I received an sms during lockdown that my arrangement was cancelled and that I must phone them. I phoned them on 3 Sept and 25 Nov and the official Nazo helping me advised me that I request a cancellation of the amount. She advised me to visit the Cape Town offices. I went to the Cape Town offices and was rudely awaken by the official Roxy who said that I was liable for the R200 00 utility bill as they already given me a rebate. I had leaks on my property and I installed a Water Management Device. I had to agree to install this device to apply for a rebate. Between the application for the WMD and its installation the account skyrocketed from R 6 000 to R 400 000. The installation came with its outages for weeks on end. I was bul**** and intimidated by Lindeka Dubase today to pay R 12 000 or I will be disconnected. I do not know what to do. Please help.