And in this case, even HR probably won't be able to give you an answer. They'll most likely take on again when they have vacancies again, and until that happens they probably won't - and it's impossible to predict for certain when those vacancies will occur. I know it's probably a frustrating time for you, and it would be great for you to have a definite start date, but as I've told you before you are still much better off than the vast majority of people who've applied for the positions!