How to Remove "End of Survey" Message?

Hi fvarzgani
There are four different EOS options: default message, custom message, external URL, or response summary. One of them must be selected. What do you want displayed to the respondents when they submit their survey? That will determine which of the four EOS options you should use.

This is not working for me. I view the published version and it shows the default message. Can someone assist?

if any message is applied under survey flow at the end of it, then change from here. 

https://www.qualtrics.com/support/survey-platform/survey-module/survey-flow/standard-elements/end-of-survey-element/

Else you can change message from here same as mentioned by @MatthewM .

https://www.qualtrics.com/support/survey-platform/survey-module/survey-options/survey-termination/