Thank you for your post and welcome to the forums 🙂
Don't worry, this sometimes can happen! I am going to take a guess, and say you have an iPhone? If you go to Settings>Phone>My Number. If you press that and then change it to the number you ported over, as I can imagine It's still the number we provided 🙂
Let me know if that does the trick.
Ryan_N - Forum Team - https://community.virginmedia.com/t5/custom/page/page-id/WelcomeGoodFolk