Hi @asta17,
Thank you for your post and welcome to our community forums. We're here to help.
It's great to hear that your partner had joined us. If you have ordered a Volt bundle which included an O2 SIM card then this would be dispatched directly by O2, and so it'd be best to contact them directly for further details on when to expect that this will arrive.
You can contact them by calling 0344 809 0202 (or 202 from an O2 handset).
Let us know if there's anything else that we can assist you with.
Thanks,