I received a call from my "bank support line" a while ago. Now these people were real con artists, they had all my data, used correct chat scripts etc. It all sounded so legit I almost missed the moment they asked me for SMS confirmation code, at which point I realized it's a scam. Not being sympathetic to these guys but at least they were highly professional and inventive scammers, unlike those I mentioned above.
This type of scam is more common in my region I don't know how these people are able to get our information data from the bank, they know so much that if you are not a security-conscious person you will fall for their tricks and before you realise your account balance is wiped out in a sec, .
It takes a lot of courage to to avoid been scammed