I've gone into dispute with pistach over the same thing. Order ndd, never arrived. Didn't read messages, eventually responded saying "i'll sort", still nothing. we're now in dispute and i've been told on sat it'll be resent, still nothing. never using again, its not even close to a 9.6 rating.
update - now been over a week since we went into dispute and I was told they'd resend. still nothing. i've order ndd from someone else during this and it turned up the next day, so its not royal mail at fault.
update - now been over a week since we went into dispute and I was told they'd resend. still nothing. i've order ndd from someone else during this and it turned up the next day, so its not royal mail at fault.