Has this just started? Was it working correctly before? You could try flipping the main power off switch if you are not using the property. If some appliances are still working (fridge and freezer) the fault may lie with them.
@shergar13 Hello, do you mean your smart display? If so you can ignore it they often go wrong and it is not your bill. Check the actual meter and make sure it is not showing its reading is still close to normal.