My daughter managed to buy 24 hours of football pass with NowTV by pressing the same button repeatedly on the remote within about 5 seconds.
So a crash like this doesn't surprise me.
My daughter, whilst roaming in the US from the EU somehow managed to get unlimited data after her initial miserly roaming allowance was used up.. simply by switching airplane mode on and off repeatedly until data worked.
I was stressing getting back home to a huge bill, but kept the "all chargeable services have been stopped" messages just in case.
My final bill was £300+, zeroed.
Phew!
After long research, we found correlation with marketing moving their target from only students to 'older people'. Apparently the latter 'doubleclick' on links and buttons in webforms far more often. At least for us they did.
That was probably not a crash, on some that did a partial reset.