they called, no message...I called back and it said the number can't be completed as dialed.

no message. called back and the line was always busy.

I just got one from that same number on my cell today.  They said they were from Online Pharmacy and it was about my order...Uh, I've never ordered anything from them or anyone else online for anything like that!

Really frustrating

Answered and heard what sounded like a girl who didn't know what to say.  I didn't say anything other than "Hello".  She hung up after about 3 seconds.

From a sales room.  The girl left the line open (thus leaving me a message) while talking to someone else.  There were many similar voices in the background.  Don't answer it.