If you can get an INFOPASS, initiate one. You can also initiate a congressional inquiry. Splitting hairs over what the Tier 2 personnel said, or the FO providing you with the same response are irrelevant IMO, the fact of the matter is your case is stuck somewhere, possibly one of the unfortunate ones that somehow falls through the cracks year after year. Again, it is possible your FO intends to bunch all DV based AOS applications together and treat them towards the end of the year. All I'm trying to tell you is stop trying to read some implied meanings into whatever they're telling you. Keep pushing, keep trying until you get the IL and the much needed approval.