Your MY O2 should show you all up to the current day but for some accounts it appears broken at the moment.
Try calling CS on 202 and ask them for the info (if you can get through)
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.Currently using:
Pixel 7a (O2 & Lyca), One Plus 6 (Sfr), iPhone 12 Pro Max (Vodafone)