Welcome to our Community Forums! Thank you for your first post and I'm very sorry to hear that you're having some issues accessing your network while abroad. We understand that this can be very frustrating.
You can also take a look at our Roaming Costs in Italy page for more information about the Roaming charges. If you have a spending cap in place, your Mobile may not connect to a network automatically as the roaming charges may take you above your spending cap.
Please take a look at what our VIP @enlli suggested and see if this can help. Let us know how you get on and if you need any further help or support.