An important feature of consolidating bills is that it helps your credit record.
As you accumulate more and more debt, you damage your credit record. If you have missed payments or carry excessive credit card debt, your credit score suffers.
When you consolidate your accounts and pay off your outstanding debts, you stop the damage being done to your credit. You show accounts that are paid off which helps with repairing your credit.
So how does that benefit you? A better credit score means lower interest rates in the future for things like a mortgage, car loan or home refinancing. In the long run, it can save you thousands (maybe tens of thousands) of Rands