submit form to iPay88 payment page on ajax success

Question

i have some data needed to save and populate a form clicking a button. Concurrently need to submit the form to iPay88 payment page. I tried with the code below, data saved and i got success in console.log but the form doesn't seem to submit as it is not redirect to the payment page.

$('#makePayment').click(function(e){
  e.preventDefault();
  $.ajax({
    url: '/OpenSupermall/public/postOrder',
    type: "post",
    data: {
      'card':$("#paymentForm input[type='radio']:checked").val()
    },
    success: function(){
      console.log('success');
      $('#paymentForm').submit();
    }
});