Incompetent staff needs basic training

This review is directly related to the incompetence of the accounts staff at Oxygn. I requested an account statement yesterday via Whatsapp, e-mail and telephone, but I received 3 e-mails back with only an invoice. I replied on those e-mails and clearly stated that I did get the invoice and that I needed a statement, but the invoice was sent back to me again. I called this morning again to speak to someone from accounts, but they are all on lunch since 11:30. This is extremely frustrating and I would suggets that Oxygn provide training to their staff with the difference between an invoice and a statement. How will I ever get a statement?