If you followed the instructions on the pack the SIM was in @Michy (and that are in this guide: Guide: Sim Swap: a mini guide 2017 update ) it should be done within 24 hours but normally much quicker.
As you have been waiting longer than that there might have been an issue, so I would suggest getting in touch with customer services - you can phone them on 202 or 0344 809 0202, or message them on social media:
Facebook (https://o2uk.co/O2CFB) , Twitter (https://o2uk.co/O2CTW) or Instagram (https://o2uk.co/O2CIG)
Please note, this is not customer services and we cannot access your account. Do not publish personal details (email, phone number, bank account).
Link to our guide on how to contact them can be found here
