Ridiculous charges

In February I registered for water and electricity as a new tenant and I paid R780 and R680 deposits for both respectively. I was given an option of prepaid for both but I opted for prepaid only on electricity. When I received my statement for March, it was R1802.19 included in the statement was R780 deposit, electricity R281.88 so I went to the office in Lynnwood Park to query the deposit as I paid it before. I spoke to a lady called Boikanyo and she could not explain to me why I had to pay the deposit twice and she went to someone at the back to get clarity. Boikanyo then came with some shady explanation from this person who did not even bother to explain to me as to why I must pay the deposit twice. I then decided to pay the R1802. 19 even though I was not satisfied with the explanation. This month my bill is R 1524,84, I need to understand why am I being billed for electricity even though I am using prepaid and how is that my water consumption is the same as the previous month. My water consumption was high in January as I had a leaking toilet which I got fixed. Even if I was a perfectionist the is no way my both water usage and sanitation can be 40 each for both months. I refuse to be taken for a ride.