And I'm not the only one. Just started happening to me when I tried to purchase something from their Flash Sale.
And so I decided to try to give this a little more visibility, as a couple of other users reported this in the Flash Sale thread, and you can see a big thread on it here on their support site (haven't read through the whole thing yet, but you can see there's multiple people in there and customer support has proven useless for them as well, and that the issue apparently stretches back as far as a year and a half to the present).
Tried all kinds of things, from using a computer/phone/PS3/PS4, different cards, adding and removing cards, adding and removing stuff from my cart, purchasing different items, damn near everything you can try (and yes, these cards are all valid, and have been used on the PS Store plenty in the past, as well as on other sites recently with no issue). And then customer support was completely useless. What I was told was that, thanks to this issue on their end, I failed to use a card too many times, and then it "locked" paying by card (without telling me ever, naturally), and that they apparently have absolutely no way to fix it on their end.
So yeah, this is crap, it's apparently an ongoing issue with no way to fix it other than "eh, just buy PSN cards" (which only have fixed increments as far as I know, so that results in paying more money), and Sony's customer support sucks and will only keep giving you the same canned answers.
And so I decided to try to give this a little more visibility, as a couple of other users reported this in the Flash Sale thread, and you can see a big thread on it here on their support site (haven't read through the whole thing yet, but you can see there's multiple people in there and customer support has proven useless for them as well, and that the issue apparently stretches back as far as a year and a half to the present).
Tried all kinds of things, from using a computer/phone/PS3/PS4, different cards, adding and removing cards, adding and removing stuff from my cart, purchasing different items, damn near everything you can try (and yes, these cards are all valid, and have been used on the PS Store plenty in the past, as well as on other sites recently with no issue). And then customer support was completely useless. What I was told was that, thanks to this issue on their end, I failed to use a card too many times, and then it "locked" paying by card (without telling me ever, naturally), and that they apparently have absolutely no way to fix it on their end.
So yeah, this is crap, it's apparently an ongoing issue with no way to fix it other than "eh, just buy PSN cards" (which only have fixed increments as far as I know, so that results in paying more money), and Sony's customer support sucks and will only keep giving you the same canned answers.