We had the same thing happen. A week behind since almost a year ago. They told us at the time and I wasn't sure that I paid it but thought I must have as they didn't say anything again. Then they sent us a remedy to breech thing saying it was behind.

No I don't think they can ask you to pay your current rent. They can only ask you to be paid up to where you need to be paid up to (current, or a week or fortnight in advance). So really you'd only be $330 behind where you should be, if you haven't missed anything else.

I'd give them a call and apologise, say that this was totally unexpected and you don't have an extra $330 laying around so can you please pay off a little bit over a few weeks.