@Darkness97
My bank regularly blocks my Visa card when I try to buy credits with iStripper. it's an overseas purchase so they are fussy about it.
In fact I have gotten used to making the first attempt, having my bank block it, wait for the fraud text from my bank and replying that it isn't fraud and then the bank says 'ok, thanks, wait 5 minutes and try again' which I do and it usually works.
I bank at a smaller regional bank not affiliated with the biggies and they do their own thing. I've called them to tell them that this purchase is ok but they won't white list it so I have to go through the same crap every time.
The 'block' itself is usually only for that specific purchase and not a total shut off.