I, for one, think it's a very good sign that Ms. Cromer is ignoring that voicemail.
I'd argue that people here expecting her to reach out to them about something so small speaks more to their own entitlement than it does to the responsiveness of the athletic department.
I disagree.
At my company, either myself, or a member of my staff, respond to ever email or voicemail.
I feel that its common courtesy, and good business.
You may consider the OP's position "small", but obviously, they didn't.
That's how I look at it.
Maybe I don't look at a person's question, concern or complaint as "significant".
But they felt strongly enough about it to contact me.
They deserve, at the very least, the courtesy of a response.
I've found, in most cases, just the fact that they received a response, works wonders.
I've also found that, by speaking directly to someone, I can usually resolve most issues, amicably.