I did this to my bank. They called me, I told them that I'll not talk to them as I can't identify them and that I'll call them back in standard number. Bank was

I did this to my bank. They called me, I told them that I'll not talk to them as I can't identify them and that I'll call them back in standard number. Bank was really not prepared for this. They blocked my card (call was about suspicious transaction that was ok) and the transaction. I called to unblock transaction, but card remained blocked. So I had to call again. It all took precious time, they really should anticipate this more.