I can't see your solar on the bill anywhere, but it does look like you might be on one of the old solar tariffs where you export everything that you consume?
I'm guessing that's the case, as you got a rebate of ~$240 from your solar.
There's nothing obviously wrong with the bill from what I can tell. I'm assuming that "5397" is your solar meter number? If so, the first number makes sense, but I don't know what the next three are.
Sorry, that's about all I can help you with.
Are you sure that the bill isn't correct and you have an appliance that's malfunctioning? If your fridge was defective for example, it can easily double your consumption. Maybe try and work out what changed in June. Going by the bill, that's when your consumption jumped up.