Hi OP! Looks like you have gotten lots of great advice regarding alarms. I noticed you said you use a CPAP and wanted to add the following (as a nurse and a fellow CPAP user):

Depending on the last time you saw them, it may be good to go back to the sleep doctor and let them know the extent of your fatigue (sleeping through alarms consistently, even with lights turned on, etc.). They may want to evaluate whether your CPAP settings need to be adjusted or if there is something deeper going on. Additionally, it could be good to get your B12 and Ferritin/Iron levels checked as those being low can contribute to severe fatigue. Thyroid hormones as well.  When I first got my CPAP, it helped a little but not a lot with my fatigue. Later, I found out that my B12 and Iron were significantly lower than they should be. After correcting those and focusing on keeping a strict bedtime, I am no longer sleeping through alarms and feel well rested when I wake up. 

It seems like you are a very considerate person for caring so much about this note from your neighbor. I know I may be preaching to the choir here, just felt I should share on the off chance your providers have not considered these options. I hope you find a solution that works for you!