Debit deduction done on wrong date

my debit order was done on the 21/01/2016 after repeatedly advising Standard bank that my date of deduction must be the 23rd or after. now the debit order rejected and costs have been incurred, this has previously happened on my account. it frustrates me to no end because Std Bank does not implement a process or check to actually have it done on the correct specified date. This is a breach of contract that Std Bank is exercising! Now Debt collectors will call me and my credit rating will be put in jeopardy!!! Who WILL FIX THIS!!!! I cannot handle the incompetence of such a huge organization! Once I can understand, twice is unacceptable! if this is not rectified I will be going to the CEO with this and will be ending my business with Std Bank. HIGHLY UPSET CLIENT!