Nedbank takes too long to mitigate internet ********** activities!!!

Nedbank I reported that there has been ***** on my card. I reported that I immediately wanted the card payment to be stopped as I did not authorize a payment of 5,500 for swan lake tickets - Paul from nedbank said I must fill in a dispute form - which I did - and then I received an automated reply that my dispute will be lodged and it can take 30-40 days - why can’t my payment be immediately frozen?? I have reported this immediately and why can nedbank not mitigate the loss by immediately freezing the payment! Why must I wait for 30 days ???? Where is the immediate action ? Where is protection against ***** and *****ing ?