*****ulent transaction still went off my account despite having reported it early enough???????

We reported a case of ***** on email and contacted the bank the next day. The transaction still went through on my account and Standard bank is now charging me a international fee for the *****ulent transaction. The card was stopped. No one has come back to say what is going on and why the transaction still went off the account and with a different amount to the first notification. What is Standard bank doing?????