Hi @nick-,
Welcome to our Community Forum, thank you for your first post!
I'm happy to hear that you have found your missing SIM card! Apologies for the late reply.
You can always get in touch with our Mobile Team via Text on 0753 301 6422, or you can call them on 0345 600 0789.
Please let us know if there's anything else we can do to help.
Thanks!