Top Up has vanished

[BobMac]

On 30th May I topped up my phone with £10.  I only use the phone occasionally as a phone, it's main use is for receiving text messages for 2FA from my banks. I've not made any outgoing calls or messages but my balance is now £0.  Where has it gone

[jonsie · Accepted solution]

Money is taken in exchange for allowances each month

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

You would be better off changing to tesco, giffgaff or 1pmobile

Guide: How to get your PAC [June 2021 Update]