problem retrieving referrer id on a website

Hello, I am working with an intercept, I already pasted the code on my website and above that code I put the one that indicates qualtrics on the page, but when I answer the survey, the id still does not link to the external reference and in the survey it does not I see contact information that I have in the directory.

This is the code that I am placing above the intercept code:

if(typeof QSI === "unlimited") {

     QSI = {};

     QSI.config = {

       externalReference: extRef

     };

 }