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.