Although a different tracker issue to mine, I have had pretty similar issues with EBS in relation to documents and other correspondence. I have original documents relating to a tracker offer and application forms that were not in my subject access request and do not appear on their records and only for I still hold the original documents I would have no case. I have other instances where document were supposedly sent when they were not. Go through all your documents thoroughly and more than once, compare the log of correspondence(request if you haven't got it) with your documents and see if your missing anything else, make specific requests with the Sar's team for any further requests or information needed. Have you been in contact Padraic Kissane's office, extremely busy but is best to look at this for you