yes I agree my credit card's fraud investigation company and they did not ask me any questions that I was suspicious about, they just confirmed if I had made a transaction with a certain company, no amounts and they did not ask me for any personal details.

are they legit?

This plumber is an arsehole who loses his temper when the phone records prove he's overcharged you by an hour
He charges a first hour which incl his travel time ($120) and then an hour travel time on top
Charged 5 1/2 hours
He was here for just over three
Be careful to keep your phone records as he's a rip off artist

Got a text from a mobile number advising us to call this number regarding a possible fraud transaction on a credit card that is not even ours. Sounds dodgy to me