I tried to buy a new prepayment certificate, it is needed urgently for this weekend.
I paid, but never got it emailed through like usual.
Thinking there was a mistake, I tried to buy it again, but it came up with a warning that the back button had been pressed on the payment page before and if I paid again I may get charged twice.
Checking my bank the payment is showing that NHSBSA has been paid (pending), so the payment definitely went through.
They are shut now, but I'm at a loss what to do, as the payment was successful I don't want to pay again, but I also don't want a huge fine for not having a certificate.