debit orders returned but sufficient funds in account

According to my statement below, on 1 November, my account balance was R715 - 58. Immediately after that, two of my debit orders are unsuccessful but I had R715-58 in my account which was more than enough to cover the two debit orders!

Why were my debit orders unsuccessful when I had sufficient funds and I demand to know why! I was also charged R12 for the debit orders not being successful. That must be refunded!

Ms S Stegmann(reply via email)

01/11/2019 01/11/2019 Insuf. Funds, Eft Virgin Act:1707 0.00 0.00 01/11/2019 01/11/2019 Debit Order Insufficient Funds Fee 6.00 709.58 01/11/2019 01/11/2019 Insuf. Funds, Eft Dr Afrihost 82d3e 0.00 0.00 01/11/2019 01/11/2019 Debit Order Fee 3.50 715.58