That's where Slydial comes in. It's a service that lets a caller go directly into a mobile number's voicemail. Even better, the basic service is free, and no signup is required to use it unless you need more functionality.
Visual voicemail on a Skype for Business desktop phone, Skype for Business app, or the Lync client for Mac.

Mention the closure in the beginning of the message, convey when your business is reopening, and don't forget to wish the callers a happy holiday if the occasion calls for it. If you're away from your office, check your voicemail remotely to keep up with incoming messages if necessary. Or get voicemail to email capabilities set up on your phone
Friends and colleagues speak to each using first names only. So do people of authority. They do not call each other and leave voicemail messages asking for Mister, Miss, or Mrs. Therefore, when you call a person you want to do business with and you leave a voicemail message, refer to them by their first name only. Don't say mister, miss, or misses. Don't say their last name. Begin your voicemail message by saying only "hi/hello" followed by the person's first name. Or, you can even forget the "hi/hello" and just say the person's first name. That is how you show confidence and authority and separate yourself from weak salespeople.