Caller: unknown scam or .spam

My phone blocked the call as spam. Looks like they are using a series of 048 numbers. I have three different unknown 048 numbers in two hours that my phone has automatically blocked.0481 845 815, 0480 003 299, 0480 003 020)

hung up quickly after i answered ( or rather connected the call - i didnt say anything as i suspected a spam call)

Called me and hung up after I answered. Will block this number.

Delay in time before speaking.
Almost had my first name correct.
Claimed to be from the "Visa and Mastercard Security department"

Scam, hung up on quickly. Blocked number on my phone.