Confirm Action inside JS success call - cancel button also submitting form

Question

When a user clicks on submit button, I want to show a confirm dialog with a count of records that would be affected. To get the count, I am calling the related url inside ajax and in success am trying to confirm from user. But, in the confirmation dialog box, when user clicks on cancel also, the form is getting submitted successfully.

$(document).ready(function(){    
        $('form').submit(function(e) {
            // e.preventDefault();
            const a= $(id_a).val();
            const b = $(id_b).val();
            const c = $(id_c).val();
            const d = $(id_d).val()
            $.ajax({  
                type: "GET",  
                url: "/myURL",  
                data: {
                    'csrfmiddlewaretoken':$('input[name=csrfmiddlewaretoken]').val(),
                    'a':a,
                    'b':b,
                    'c':c,
                    'd':d
                },
                success: function (data) {
                    if (confirm(`${data.result} records will get affected. Do you want to continue?`)){
                        $('form#id_save').submit();
                    }
                    else {
                        e.preventDefault()
                }
        });
    })
    })