Worst service ever,

I sent a mail on the 9th September advising Cartrack that my Debit order date should change to the 1st of every month, and I received a mail that it was acknowledged, on Monday the 29 September Cartrack debited my account and obviously it did not go through due to no funds in the account, I then sent another mail to Cartrackand the mail was acknowledged again, today 30 September I received a mail stating that it was not done by their admin office, to make matters worse Cartrack debited my account again today but this time with the wrong amount, Cartrack better get their act together!!!!!