The Non Responses Widget provides a list of records of customers that did not complete the survey. You will find it on the Add widget button on any report you are allowed to edit it. Just go on Data Transport ➝ Non Responses. You will find all the usual filter options for date type, date range, and various advanced options like country, company or division.

The Non Responses Report shows a list of records of customers with email, order date, survey sent date, ID number that can be drilled down so that you can have more information and the Survey URL that provides the same survey link that was sent to your customer. Can also be exported and printed. If you are copying the survey link from this report, you should right-click the "Survey URL" and click "Copy link address". 
If you just copy export the widget by XLSX the Survey URL will contain the entire survey link.

Attention: Please be careful with the Survey Link shown against the records. Completing the survey link will result in the survey being completed and the results being stored in the tool.