Hello, I got a voice message to communicate with my officer but I don't have his number yet, what can I do?

I went to introduce myself on the 4th but it was closed, what can I do?

Excuse those who have already been in this January 2021, I have an appointment please if you know it is open ohhno

Simple calls the same number where they sent you the message and you have to dedicate time because that takes up to two and three hours Sometimes