Sorry to hear that.
😒If your able to connect to Vodaphone's Data services and access the Internet then your APN's are correct so their should be no need to go into those.
Process of elimination: Can U try ure Sim in another phone2 rule out either the Sim or Phone which may be at fault.
It may be beneficial to visit an  Stores Genius Bar if you have one local via an appointment via
https://www.apple.com/uk/retail/geniusbar/ or sometimes popping in to speak to an  specialist they can help.
Or possibly your local Vodaphone HighStreet Store employees can take a look for you.
Current Phone >
Samsung Galaxy s²³ Ultra 512gb Phantom Black.