on 21-04-2020 17:56
on 21-04-2020 17:57
on 21-04-2020 17:59
on 21-04-2020 17:59
Have you checked to see what's using your data? If unexplained then you need to speak to O2. All numbers in this link
Guide: Coronavirus Community Help and Support
Veritas Numquam Perit