o2 is experiencing issues with moving numbers from one sim to another @Judyta , with it expected to be fixed tomorrow (Friday 22nd July).
I would wait until after the weekend to see if your number has transferred, and if not get in touch with customer services.
You can do that using social media if you have any of those:
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 Do not publish personal details (email, phone number, bank account).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
