Hi @Zaimah
Welcome to the customers help customers Community of Vodafone.
Have you switched from another provider to Vodafone?
If so, was it now already time to switch immediately and is your number already taken over by Vodafone? Normally you have a month's notice with your old provider! Or did your new subscription start yesterday and it didn't work yesterday? Then this may be correct because it always takes a while before people are actually fully connected to the system.
Do you already have reach? Just switch your phone off and on again and then see if you get Vodafone in the picture.