I received an email stating that someone tried to ...

I received an email stating that someone tried to reach out to me. The email contained a number and extension to call back. Your toll-free (833) number is disconnected. I had to google the company to get the direct office number. Was immediately transferred to the woman I needed to speak to, but there was no answer and the voicemail is not set up. So how do you expect to communicate or receive call backs with no working numbers or voicemail boxes?