Creatives on Pay Per Call networks?

Is it common for there to be no sample baers for advertisements on a pay per call network? I have never done pay per call but all the other CPA networks seem to have pre-made ads they want used.

Should I worry if I went through the interview and that was fine. They took me on, but I sent 2 emails to them and none have been answered. The emails were about the baner advertising? I also could not find a Skype number or anything else with them. this has all been in the same day. Accepted and ignored. I watched their intro video and that was the what they said to do, contact them and they would help.

I did call and they answered but some girl told me they could not let me see a sample, which is what the intro video said to do, "call and ask to see an example" so I could model my ad after it. She told me it was confidential. I don't know if she meant the 1-800 number or the advertisement, that is why I followed up with an email.

All I need is a reliable network for addiction CPA. There looks to be a great network out there but they pay over 300 dollars a pop. To me that means super high standards to meet for payment.

The network that won't answer the emails has a 90 second offer that seems better, but not if they don't answer emails.

Is this normal?