Uauthorised transaction

A lady from 0110662337 & 0110396781 phoned me today @12h03 and claimed to be calling from FNB Credit Card Division. She said she wanted to verify my Credit card of which she gave me the numbers in front of my Credit card and wanted the expiry date and the numbers at the back of my Credit card. i became suspicious and refused to divulge the numbers at the back. To my surprise within an hour, I received an sms notification from my bank, stating that R2590.00 has been deducted by Hotelia Travel. <br> I reported this to FNB for them to reverse this transaction as it was unauthorized. I don't know anything about Hotelia Travel and want nothing to do with them. i have my own Holiday Club. What kind of a marketing strategy is that if they call it a strategy is this by claiming to be other institutions? This is misrepresentation and a serious inconvenience at its best.