Your balance is 0.00 - but I topped up with £20

[Anonymous]

I was with Virgin but transferred to O2 by asking for a sim with a £10 bundle.  Once installed I topped up with £10 but got a text to say my balance is 0.00.  I topped up again with £10 and again it said I have nil balance.  I have an old O2 phone and it's completely different - can anyone understand or explain why it says my call time balance is 0.00?  

Thanks.

[Cleoriff]

Not sure there is any point in answering as you have deleted your account. However, Big Bundles take your money in return for allowances.

All explained here https://www.o2.co.uk/help/pay-as-you-go/big-bundles 

£20 Big Bundle

• Unlimited minutes, unlimited texts and 10GB of 2G/3G/4G data in the UK with data rollover of up to 10GB a month, subject to bundle caps in exchange for £20 each month. Includes discounted international calls from the UK starting at 1p/min.

[MI5 · Accepted solution]

If you are on a £10 bundle and you have topped up £20, you should now have £10 credit plus your bundle allowances.

Checkk in your MyO2 http://www.o2.co.uk/myo2 but it can take 30 mins or so to update after the top up.