Contact Virgin Mobile (call 789) and pay the £15.32 unlock fee. If you're still in contract, you'd need to pay the rest of the contract off.
Welcome to the community and thanks for posting.
I can see Shelke has been helping you out which is great.
Did you manage to get this sorted?
Let us know if you need anything else.
The do's and don'ts. Keep the community welcoming for all. Follow the house rules