Well, it seems, they aren't even too bothered about acknowledging they even receive an N244.
I faxed mine, a few days later emailed to ask if they got it,
they replied saying 'good afternoon, we have not received your 'n245'!!
I got confirmation saying the fax went though, but this won't do me much good.
I then posted the N244 and they're saying they still haven't received it.