What should be the step to prevent the spam bot emailing to my email using recaptcha and laravel?

Question

this is very prostrating to me, I don't know how to prevent this spam bot mailing to my email. every day they spam my email. here is what happen today.

Problem: Spam Email Bot

Question: How to solve this bot sending to my email?

Here is the step that I do to prevent, however this is not remedy to solve the issue.

1. They suggest to put captcha robot checkbox
2. Put Captcha Robot Image

Laravel Code:

<br>
{!! NoCaptcha::display() !!}
@if ($errors->has('g-recaptcha-response'))
    <span class="help-block">
        <strong>{{ $errors->first('g-recaptcha-response') }}</strong>
    </span>
@endif
<br>