You will be expected to pay the full amount for the month for the following reasons:
1 - Damage was not a result of O2's negligence.
2 - Your sim card was still functioning and able to have been used in another device.
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)