We know not every call goes to plan. A few things that can cause confusion:
Some failed or unanswered calls may still result in a small charge, depending on how far the connection got before it ended.
A call that connected but had poor quality may still be billed, because the provider registered it as a completed call.
If you believe a charge doesn't reflect what actually happened, contact support. We'll review the records and, if there was a genuine error or service issue, return the credit or add make-up credit to your account.