@Oyster, did you have service with Public Mobile prior to your "number change"? Are you referring to the number change as part of signing up for this service? In any event, if you have set up and account and you are not able to connect to the network, the issue may be account related and the moderator team will be able to look into this and make the necessary corrections. If you think you have an account problem, the moderator team can be reached via private message using this link. Refer to the following link for information on contacting the moderator team.
