Welcome to the Community, I'm sorry to learn about the problems you're experiencing with your mobile service lately.
I've been able to locate your account and take a closer look at this from our end for you. We're seeing some slight problems with a mast in your local area although I'd expect the service to be a little intermittent, not completely down as it is.
As a result, I'd like to request that a replacement SIM is sent out, so that I can do that we'd need to confirm some information with you. To do that, could you respond to the private message I've sent with the requested information and I'll get right to it.
You can view the message by clicking the purple envelope on the top right of this page.