How can I check the detailed bill

[Sarge]

I topped up my phone but few days later I have noticed that most of the payment has gone. I don’t know how to get the detailed bill.

[Cleoriff]

Hi @Sarge 

Are you on a Big Bundle? If so, money is taken in exchange for allowances.

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

[Sarge]

Thank you. I topped up for 30 pounds few days ago and now I have 4 pounds on balance

[Cleoriff]

Then check with O2 @Sarge 

Numbers here Guide: Coronavirus Community Help and Support 

Advice from an O2 Guru regarding a way to get through:

If you call 4445, when it comes to the reason you are calling stay silent for 15 seconds and you will be taken to the keypad options.

Press 2 for Everything Else

Press 5 for More Options

Press 7 for Anything Else which will put you though to an advisor.

Press Upgrade, Lost/Stolen or Fraud if you have to.

[gmarkj]

Have you subscribed (or been conned) by a premium text service?
Community help guide:
https://community.o2.co.uk/t5/How-to-Guides/Have-you-fallen-for-or-been-conned-into-a-premium-rate-s...
Help from other sources:
http://www.payforitsucks.co.uk/
How to avoid additional charges (also community guide):
https://community.o2.co.uk/t5/How-to-Guides/Tips-to-avoid-unexpected-charges-on-your-bill/bc-p/12185...