St. Jude's Recovery Center interview questions

I was called about coming in for an interview about this position, but was in a meeting and my phone went to voicemail. I tried to call back immediately, but no one answered. Over the course of a few days, I tried calling several times and I left a number of messages for the person who originally called me, but never received a call back. Each time the phone would ring, go to voicemail, and I would leave another message. I probably left around three messages (each one very polite - stating my name, number, and the position). It's interesting because the company is paying money to have this job posting "sponsored" on Indeed, but the person in charge of scheduling interviews does not return candidates' calls. I think that even if they returned my calls, at this point, I would not be interested in interviewing with them. I would not recommend applying for jobs with this company.