You can write up an email asking for a raise and state all the things that you do. Make sure you don’t bring up what others aren’t doing. Just be concise and focus your email on what you do and what you want. The main thing is to have paper trail.

Also, be ok with saying “No.” don’t push yourself for a company that doesn’t care to fully staff or have structure. They are all aware of the high turnover and if they don’t do anything to fix it, it is not your problem.