Hi there @markmhayward, thanks for your post.
Sorry to see you are having issues with your inbound calls, just to confirm do you have an iPhone by any chance?
If so are you able to go to Settings>Phone>My Number, once there are you able to make sure the correct number is showing? If not can you please change this then give the phone a reboot. Once this is done can you test the phone to see if this has helped?
Regards
Nathan