Javascript - How to check VAT number from against VIES

/********* JQUERY ***************/
var settings = {
  "url": "https://ec.europa.eu/taxation_customs/vies/services/checkVatService",
  "method": "POST",
  "timeout": 0,
  "headers": {
    "Content-Type": "text/plain",
    "Cookie": "JSESSIONID=Ftckke83MgxmHiawNT4IFdE91wT5wtvAYuNt9tFl7_lZzWlUlYoO!1091839786"
  },
  "data": "<soap:Envelope xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\"\r\n  xmlns:tns1=\"urn:ec.europa.eu:taxud:vies:services:checkVat:types\"\r\n  xmlns:impl=\"urn:ec.europa.eu:taxud:vies:services:checkVat\">\r\n  <soap:Header>\r\n  </soap:Header>\r\n  <soap:Body>\r\n    <tns1:checkVat xmlns:tns1=\"urn:ec.europa.eu:taxud:vies:services:checkVat:types\"\r\n     xmlns=\"urn:ec.europa.eu:taxud:vies:services:checkVat:types\">\r\n     <tns1:countryCode>EL</tns1:countryCode>\r\n     <tns1:vatNumber>000000000</tns1:vatNumber>\r\n    </tns1:checkVat>\r\n  </soap:Body>\r\n</soap:Envelope>\r\n",
};

$.ajax(settings).done(function (response) {
  console.log(response);
});


/********* XHR ***************/
var data = "<soap:Envelope xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\"
\n  xmlns:tns1=\"urn:ec.europa.eu:taxud:vies:services:checkVat:types\"
\n  xmlns:impl=\"urn:ec.europa.eu:taxud:vies:services:checkVat\">
\n  <soap:Header>
\n  </soap:Header>
\n  <soap:Body>
\n    <tns1:checkVat xmlns:tns1=\"urn:ec.europa.eu:taxud:vies:services:checkVat:types\"
\n     xmlns=\"urn:ec.europa.eu:taxud:vies:services:checkVat:types\">
\n     <tns1:countryCode>EL</tns1:countryCode>
\n     <tns1:vatNumber>000000000</tns1:vatNumber>
\n    </tns1:checkVat>
\n  </soap:Body>
\n</soap:Envelope>
\n";

var xhr = new XMLHttpRequest();
xhr.withCredentials = true;

xhr.addEventListener("readystatechange", function() {
  if(this.readyState === 4) {
    console.log(this.responseText);
  }
});

xhr.open("POST", "https://ec.europa.eu/taxation_customs/vies/services/checkVatService");
xhr.setRequestHeader("Content-Type", "text/plain");
xhr.setRequestHeader("Cookie", "JSESSIONID=Ftckke83MgxmHiawNT4IFdE91wT5wtvAYuNt9tFl7_lZzWlUlYoO!1091839786");

xhr.send(data);