Abusive employee at 6am in the morning!

I received a call from a DMC employee at 6am this morning. When I requested that they call me during office hours the DMC employee became aggressive and said she would call me when ever she liked. <br> <br> THIS IS UNACCEPTABLE TO BE WOKEN UP WITH SUCH A BAD ATTITUDE AS WELL AS BEING CALLED SO EARLY IN THE MORNING.