Wesbank unilaterally changes payment dates andruins Chrismas

Don't bother stipulating that you wish for your monthly debit order to be paid on the last day of every month, Wesbank will debit your account more than a week early in December. When I noticed that the debit order was processed by Wesbank on the 23rd, and not the 31st as per our agreement, I called their call centre. The person I spoke to advised that an sms was sent me, I assume to inform me that the payment terms have been unilaterally changed by Wesbank. I told him that the day I received the sms I attempted to call, first call not getting through, and on a second attempt I was advised that the number was to a department that could not my wish to decline making an early payment, so I ultimately rep**** to the sms by texting "No". After taking my money anyway, during the call, the Wesbank agent said that they could reverse the payment if the funds reflect at Wesbank on the 24th, I presume to reflect back in my account on the 25th, Christmas day. The fact that my intention was to buy gifts today, the 23rd, with the funds that I had set aside, now taken by Wesbank, means no gifts from me this Christmas. Thanks for ruining Christmas Wesbank.