My first issue is to check with your bankruptcy lawyer (which I do NOT practice). The can tell you whether you owe anything for 2011 and earlier
There is no statute that says they have to give you an itemization (at least none of which I am aware). But, the only way you can "force" them to explain themselves (and get in "good standing" would to be to file some form of declaratory judgment lawsuit. That would be a royal pain,
Depending on what your bankruptcy lawyer says, keep trying to reach the attorney or someone on the HOA Board.