How to make WordPress CF7 form submit more than once?

Question

JavaScript

Hello.
Found a solution to combat spam. Variant with $('.agree').prop('checked', false); didn't work.
The comments suggested 2 options:
1) $('.agree').click(); (working option, but since version 3 of jquery you need to write .on('click') so it didn't work out what you need)
2) $( '.agree').trigger('click'); (everything clearly works, but after the form is sent, a checkmark is set and that's it, the form is not sent more than 1 time).

Hence the question: what are the possible solutions to this situation? And maybe there are more effective ways to deal with spam of this kind?