Unauthorized Debit Orders

We have been manually settling our account over the past two months, and I would like to understand why a debit order was recently initiated this past month. Could you please clarify how this debit was authorized?

At present, this action appears like [random] thumb sucking and raises concerns regarding account management, professionalism, and authorization processes. I would appreciate your assistance in refunding this amount asap and providing an explanation at your earliest convenience.