There isn't a way to recover your 2GO number. The reason why you can't do this is that you use the phone number to connect to the service. If you can't connect to your account, there is nothing that you can do. The only thing that you can recover without accessing the client area is the PIN number. This can be done after you entered the phone number that you used to create the account in the first place. For additional information, visit the support website.