Can't share any similar experience, but a quick look at their T&Cs is not very promising. Having said that, a well-documented and written case can help.
Also Air Miles are dealing with a PR nightmare right now, not sure if that will help or hurt your cause.
https://www.airmiles.ca/arrow/Travel...ctionId=300004
Cancellations, refunds and name changes are not permitted. The AIR MILES® Reward Program is unable to issue future credits.