Debit Order Dates

I have made mention to the credit department that my salary is only paid on the 20th of the money. They advised that they never made allowance for that specific date, however the debit order dates are the 15th and 25th of the month. I asked the consultant to please rather make the payment date for the 25th so that when I get paid it would be before the 25th. He then told me if the change the date then i need to pay a double debit for the amount of the wi-fi, which i cannot do in the specific month. Each month they debit the account with an amount of R108 for late fee penalty. It is honestly not my fault that they have not included the 20th to run debit orders. The payments are made via eft on the 20th monthly. Please can all the penalties charged be reversed and the. Assistance is greatly appreciated.