I have repeatedly since February told Cartrack to move my debit order date to the 7th and they failed to do so

I have repeatedly since February told Cartrack to move my debit order date to the 7th and they failed to do so. The continue to debit my account on the incorrect and now I had occurred multiple failed debit order charges on my account as a result of this. I suggest that Cartrack reimburse me for all fees incurred due to their incompetence. I am not at default here, Cartrack is useless.