So why wouldn't the Visa support centre issue me a replacement for my expired credit card?

Yes, the scammers keep on calling because, by virtue of still having a landline, they figure I'm old (correct) and of feeble mind (not yet) -- thus the perfect target for their deceptions and frauds.
It's nice to waste their time and leave them confused but what better ways are there to ruin their day? Any ideas?
What do you do when scammers call you?