Is it possible to only display the 3 text boxes to the right if 'Used service?' has been ticked for that particular row?
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This isn't the answer you were looking for, but a possible solution without a need for custom code:
Have you considered instead asking this as two questions, the second if which carries forward selections from "Used service"? I think that gets you the information you need, without burdening the respondent, but additionally might look better on more devices. These side-by-sides can get really cluttered and hard to read on tables and mobile phones.
https://www.qualtrics.com/support/survey-platform/survey-module/question-options/carry-forward-choices/
Thank you for your help I think that is the route I will have to take with this question
