Caller: Fraud Prevention?

On Friday evening, a female voice informed me on detecion of several suspicious transactions on my debit card that they have blocked an hour ago, or so. Told me that my card is now blocked and will be replaced within the next few days and that I should contact my bank about it on Monday. I have checked my account to only find no unknown activites. Haven't tried the card status yet. She correctly knew my home address.

Seems legitimate.
They rang me as soon as I accidentally tried to make a second payment online that took me over my daily limit. They advised me to contact my bank & didnt want any more details from me

Caller: Fraud Prevention

My card was declined for a purchase. An hour later this number called me to say they had blocked the transaction and asked whether the transaction was legitimate or fraud. The number is legitimate.

I claled back number (02) 8299 9534 reached voice mail but did not say for what company.

This is a legitimate number. As above, they do transaction checks for Credit Institutions.
If you're not sure ring your bank's card info line.

I called back number (02) 8299 9534 reached voice mail but did not say for what company.

Caller: FraudBureau

SMS SPAM claiming from FraudBureau