I'd like to take this opportunity to welcome you to the forums and say that I'm really sorry to hear that your number has suddenly changed.
I've taken a look at things this end and to be honest with you I can't see any reason for this, so I believe you may be experiencing a crossed line.
I'd now like to book a technician to call out and investigate this further, in order to get things back to how they should be. So I'll send you a private message in order to get things moving. Please look to the top left of this page where you'll see a red envelope icon, click on this and you'll see my message.