I'm really sorry to learn about the trouble you're experiencing with your mobile at the moment, I'd like to take a look at what the team are doing to get this resolved and assist in getting this sorted as soon as possible.
Have you been able to perform a manual network search at all? You can find out how to do that [here] if you've not already
Lastly, can I ask that you respond to the private message I've sent so I can take a look at what we've been doing to get this fixed so far? You can view the message by clicking the purple envelope on the top right of this page
Sorry again for the inconvenience this has caused, we're looking forward to putting it right.