I am trying to show the information that was entered in a form once the user submitted the form. What am i doing wrong?

I have each services stored in a varible and trying to place that into my text

let firstName= document.getElementById("firstName").value;

if(robot.checked){

text.innerHTML = "Information Entered: ";

text.innerHTML = "Name: ", firstName;

text.innerHTML = "Phone: ";

text.innerHTML = "Service: ";

text.innerHTML = "Email: ";

}