With that many voicemails left an calls made, Id say it isnt a good sign if your not hearing anything back. Have you tried email?? Or better yet have they emailed or mailed you an offer letter?? If you havnt recieved that, thats also not a good sign that your hired. Also, seems to me like you were never hired in the first place. If he told you he will most likely be calling you back, that deff isnt saying your hired, and doesnt mean he HAS to call you back. If you had a phone interview and didnt get a second call back, they probably didnt hire you. Im not trying to be negative or anything but from what you explained it sounds like you got your hopes up a little and never was really hired in the first place, I could be wrong though. Calling ten times leaving voicemails isnt going to change anything, if anything its going to get annoying to the manager, thats going beyond checking up on things, thats being a little pushy. The only reason Id say pursue one more voicemail an email is that you said you got a missed call from them on tuesday, did they leave a voicemail when you missed the call saying anything??