As the OP it will be close to Xmas when I return and having then fully used the ticket I will then be allowed to reapply I don't expect to have any news until into the New Year.
I appreciate the positive replies (I will pursue if EK do not come up with the correct amount) and even the negative ones (at least people take the time out).
I will definitely update the thread when there is something to report. I originally only posted hoping that somebody would know how long it takes for EK to resolve these matters, ended up getting some very useful info.
Thanks to all.