Your SIM card of not communicating with the network @CatherineAthert Try a manual roam Manual Roam
Vodafone 's recommendation is to try the SIM in an alternative phone, if you don't have another phone, a Vodafone Store will help. The store will be able to provide a new SIM if necessary and check your phone. When you go to the store, take some photo identity, Vodafone take security seriously.
You don't mention if you are on PAYG or pay monthly, it won't do any harm to get your account checked by live chat (as you can't dial 191 for Customer Services). Alternatively, drop the Social Team a message here Contact Us
