Telkom debit order

I have been a customer for this specific company for over 4 years, June got a new contract, accepted the debit order mandate for the specific date that I wanted, I received an sms on Wednesday saying that they will be debiting on a different date we agreed on. Caped the call centre to assist me in changing the date and guess what, they won’t be able to change it till next month. A fault one of their consultants made now will have to pay rejection fees as there won’t be enough funds for it