Wont credit my account for minutes

After reviewing apps to Record phone calls I chose this app because it puts the recording on my device. My private info wouldnt be out there and God knows who server. Under somebody elses control. What would be great at this at work. I bought five dollars of credit and started my phone call. 30 seconds into the call and hung up on me saying I had no credit left. It was an important phone call. I wouldnt trust this app to anything important.

Hung up on!! about Call Recorder - IntCall, v6.8