How to send an Email with multiple random generated 'ticketId' to the same email?

I'm going to be as detailed as i can,

My code now works with sending an Email to the recipient with a random generated 'ticketId' and a link to a webpage..

But my problem is:

I'd like to be able to send multiple generated ticketId's to the recipient. (that has already been inserted into the Database)

include_once 'includes/dbh.inc.php';

//random ticketid generator

function generateRandomString($length = 10) {
    $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
    $charactersLength = strlen($characters);
    $randomString = '';
    for ($i = 0; $i < $length; $i++) {
        $randomString .= $characters[rand(0, $charactersLength - 1)];
    }
    return $randomString;
}

//amount is the amount of tickets the customer purchases

 $amount = $_POST['amount'];
 $email = $_POST['email'];
 $days = $_POST['day'];

 $x = 1;

 do{
   $lol = generateRandomString();
   $sql = "INSERT INTO tickets (ticketId, email, accomodation, days, nights) VALUES ( '$lol' , '$email', NULL, '$days', NULL)";
   mysqli_query($conn, $sql);
   $x++;
 } while ($x <= $amount);

  if(isset($_POST['submit'])){
  require 'phpmailer/PHPMailerAutoload.php';
  $mail = new PHPmailer;
  $mail->Host="smtp.gmail.com";
  $mail->Port=2525;
  $mail->SMTPAuth=true;
  $mail->SMTPSecure='tls';
  $mail->Usernam='random@gmail.com';
  $mail->Password='xxxxxxxxxxxxx';
  $mail->setFrom($email);
  $mail->addAddress('random@gmail.com');
  $mail->addReplyTo($email);
  $mail->isHTML(true);
  $mail->Subject='Your Fyrelyt tickets are waiting for you';
  $mail->Body='<h1> xxx </h1>   <p> ticket id: </p>' .$lol;

  if(!$mail->send()) {
      echo 'Message could not be sent.';
      echo 'Mailer Error: ' . $mail->ErrorInfo;
  } else {
      echo 'Message has been sent';
  }

  }