Net10

I recently bought a Net10 phone. I was on the phone over 4 hours trying to get voice mail turned on. I burned up around 40 minutes on my Net10 phone trying to get voice mail to work. The 4 hours was on my friend cell phone. Net10 will not answer my e-mail. All I want is Net10 to put the 40 minutes back on my phone. I don't know what the problem is. I feel like they are ignoring me. Any help will be appreciated.