As a process of elimination can you insert your SIM card in another phone and try again.
Also try deleting your contacts and re enter them in the contacts app.
You both may need to speak to your respective mobile network operator to check your accounts.
Daily Driver > Samsung Galaxy s²³ Ultra 512Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "
