Billing not rectified

In the end of December 2016 a water management device was installed at our property. Our water was governed at 350 Litres of water a day as per our conversation with Kelley ***le Hartog. She informed us to fill in a letter to have our water increase to 850 Litres of water per day.We never came around in sending off the letter to increase. We were then informed by council we have a freelflow so this seemed very confusing as no seems to no what the other person is doing. However not to complain about sour g****s. In the month of may we received a bill of R2776.64 which were to happy to pay and our consumption according to cape town city experts was 25.000KL for the month. The problem steps in wereby a estimated amount of 567000KL was charged to our account on the 26/06/207 the following month (R99722,22). I do not now how this is possible and it leaves us in a state were livelyhood is being affected. The answer we have received thus far from cape town city was leaks which i do no agree to for the following reason. a) a leak is something that gradually builds up from a...z. b) bills are spread over a period of time why are there no high bills previuosly c) we never received bills this high which constitutes either a finger or technical problem. The bill dated the 17/07/2017 were billed for 44.000KL and amount R2622,43. Clearly there must be something wrong as a water consumption cant pick up this quick and drop so fast!! We have had these calls logged from Mitchells plain to Cape town to wynberg: Please see references logged ref: ********** 834, ********** 8791, ********** 056, ********** 82. We have spoken to CRM. Inspectors,debtor clerks etc. and Ombudsman. Our feedback we received thus far was informed we need to set our management system to 5OOlitre of water and the we will be rebated for the amount of R99722,22. We have even escalated to om buds man with reference number 11778/2017.Please note we still received a bill of R98913,21 this Month end and still we paying interest of almost R800 each month on the bill which is ridiculous .Please please we need help this billing is getting worse and we have no more ideas of were we can go to as a family,with drought in cape town this makes this even worse please help.