on 27-09-2024 18:20
I topped up my phone the £10 monthly that was due. It said the transaction went through, but now says that my balance is £3.50, which is what it was before I topped up.
on 27-09-2024 18:37
It won't change as your credit is exchanged for allowances.
https://www.o2.co.uk/help/pay-as-you-go/big-bundles