If a user selects one of the options, using conditional logic they are shown a message field, which is what I want, but rather than the form allowing them to click Submit, I need the form to not go any further, deterring them from continuing on. Currently, they can click Submit regardless, which causes our organization to receive many invalid form submissions. The Submit button needs to show only on the 1 option we specify.

Here is the link to the form:

Any thoughts on how to get around this limitation?