You also need to know what info dvla has, so make a Subject Access Request to them for all the information they hold on you. It wont hurt to get a copy of your medical record, so make a SAR for your medical notes from your gp, and also your occ health person. It can take a month to get the information. Your situation is that you are stuck with whatever has been said, and much more importantly, whatever has been recorded. You cannot backtrack, saying you lied wont mean you are believed (the liar defence). The only way is to make sure that all the positive information is recorded so that all the boxes can be ticked. If you have to invent a reason to go the doc and casually say you are feeling sooooo much better now without the drink, then so be it.
Once you have all the info from SAR requests, you might be able to appeal the decision regarding dependency down to misuse (cant remember if there are time limits for appeals). The focus will be on getting a restricted 1 year licence.