Wow yours has come quickly - I wonder if a claim taking a long time is a good sign then? I was on LO45 WAW-YYZ that was cancelled October 28. I was put up for the night in hotel and rebooked on LH for the flights home.Submitted my claim October 30 and still haven't heard back. I do have a case number and call them every week to ask for updates.
The difference with mine, perhaps, is that it was already swapped out on the schedule with a leased Air Belgium plane and apparently the crew didn't show up. They then said that they would be swapping out back to a LO Dreamliner but it never happened. We'll see what happens....
Step 1 - scroll up
Step 2 - read my post about the AZ case verdict
Step 3 - chase LO or go straight to the claim/litigation agency like Air Help