Thanks for your post on our Community Forums and a very warm welcome to you!
Sorry to see you've been having issues with two mobile phone numbers from Sky Mobile.
Can you tell me if this issue is still on going or has this been resolved?
If this is still on going, can you tell me if you've been in different locations when running test calls, or if the Sky Mobile numbers have been in different locations when attempting to make the calls?
Do you know of any Sky Mobile numbers that can contact you, or if there are any Virgin Mobile numbers that the Sky mobiles can call?