Well it's because I'm site security , and while technically yes it's within my scope of employment, that phone should've been answered by the previous 2 shifts, or the other security officer working the desk with that phone.
So, protip: at the beginning of your shift, notate the number of voicemails and notify your boss. Clear out the voicemails correctly. Notify your boss.
Keep track of the time stamps from the VM envelopes. This will help your boss identify who isn't doing their work, and is a "gentle" prompt. It may not happen immediately, but eventually there will be a bulk of data showing that it's particular people on particular shifts.
Doesn't help you to raise a fuss about it, but if you handle it and create documentation around it, it will either get resolved or you will be more justified in a decision to look for a new job. Or to ask for a raise/apply for a promotion/whatever.
They're tech support. 83 of those messages will be incoherent ramblings from people who barely know how to turn on their computer much less provide any useful information to actually tracking down a problem.
Context, man, this post needs context! It seriously sounds like you're mildly infuriated that you're being asked to do your job until you explain that you're actually pissed off at the other workers for not doing their job.
Even assuming they're mostly spam, you still need to listen to them in order to sort out which messages are legitimate.
I understand being annoyed by the task, but this is a job that's justifiable. It's not some petty make work bullshit (unless these messages have been collecting for months, then they can probably be safely ignored). Either way, it doesn't seem worthwhile to try and get all petty revenge about the situation.