Thank you for your post and welcome to the forums.
Sorry to hear you're having some issues with your SIM. Just before we go into this any further is it possible you could expand on exactly what issues you're having with the SIM? Do you have any connectivity at all? Have you been able to try the SIM in a different phone to see if that works?
Ryan_N - Forum Team - https://community.virginmedia.com/t5/custom/page/page-id/WelcomeGoodFolk