@mebius
You need a big bundle to pay from balance, not a rolling plan.
You can switch in your MyO2 or by text.
https://www.o2.co.uk/help/pay-as-you-go/big-bundles
Rolling plans only renew by card.
Pay As You Go: Introducing "Rolling Plans"
I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.
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