NOT WILLING TO CHANGE DEBIT ORDER DATE - SO YOU WONT GET YOUR MONEY I GUESS

I bought a new vehicle, choosing Wesbank again. When I collected the vehicle at the dealer, I was advised by the finance lady that my premium is now +- R100 more, because of a system change. Which I really wasn't happy about. The debit order date is also the 23rd - I GET PAID ON THE 25TH! - The dealership tried to change this with no success. I then tried myself today to change the date and was unable too. I was told that nothing can be done about it - so I guess you just wont get your money on the 23rd - NOTHING I CAN DO ABOUT THAT EITHER. Pathetic that I'm not able to change a debit order date - should be a simple request.