Romans 10
9 that if you confess with your mouth the Lord Jesus and believe in your heart that God has raised Him from the dead, you will be saved. 10 For with the heart one believes unto righteousness, and with the mouth confession is made unto salvation. 12 For there is no distinction between Jew and Greek, for the same Lord over all is rich to all who call upon Him. 13 For “whoever calls on the name of the Lord shall be saved.”
You always seem to be asking questions in a rhetorical way, yet you are always backwards from the answer.
Was Paul saved by calling on the name of the Lord? Is that what he was doing on the way to Damascus?
People have been calling on the name of the Lord since Enos (Genesis 4:26).