Prepaid billing

This is really dissapointment, we being billed rediculous. How can we be billed same amount from the stove is on and when it's off. It's 2 days we have not being cooking and the bill is damn high. Can't we have alternative on another company for our prepaid. This started since last month all along all was fine. I called today and was tolled they cannot see anything from their side. I must talk to Estate manager to open the meter box. The blyde estate