Electricity Bill keeps going high ridiculously

I am an owner of a Unit at ProteaGlen Estate (Soweto) - also very upset with my latest statement which gives me no joy at all. I am also paying an outstanding amount which I do not know came from I have raised it with Solver but still no resolution.<br> For period 01/06/205 - 01/07/2015 my total bill was R 2 238.24 of which i paid R 1 700.00 on 25/06/2015 (payments i make never reflect on any monthly statement i get from Solver this is concerning). My outstanding balance then became R 538.24 which in month July this amount was brought forward to R848.88 (outstanding balances are charged at 2% per month and 24% per annum according to my calculations this is not correct they are charging way more than 24% per annum in a month, One will never go out of this outstanding amount at the rate you Solver charging).<br> For period 01/07/2015 to 01/08/2015 the statement states i owe R 2 727.55 now lets minus \R 848.88"as an outstanding balance this leaves an amount of R 1 900.00 - How on earth can ones monthly bill in Soweto equate to this<br> Now Solver wants to charge a flat rate of R 450.00 based on what? please can this ridiculous billing stop and be fixed and stop using Eskom as an excuse!<br> <br> """