Contact form 7 + accessibility

I need your help with an error that i met. I want my website(eshop) to pass WCAG AA accessibility tests (webaim, achecker, w3validator). Plenty of errors came up and since there isn’t any tool to autofix it, and not temp fix upon loading like UserWay, i am correcting it one by one.

One of the plugins that i used is Contact Forms 7. Before i proceed on the problem, i must mention that i use a theme from envato market called Metro, Elementor, Woocommerce, WPML. The report of wave.webaim.org found an error in the following page https://benetialingerie.gr/contact/?lang=en fintech (and in its translation). The error is: Missing form label A form control does not have a corresponding label. You may find below the code.

<div class=”metro-contact-form” aria-label=”contact form”>
<h3 class=”rtin-title” aria-label=”title area”>Send Us a Message</h3>
<div class=”row” aria-label=”name area”><div class=”col-md-6 form-group”>[text* your-name class:form-control placeholder “Name *”]</div><div class=”col-md-6 form-group”>[email* your-email class:form-control placeholder “Email *”]</div></div>
<div class=”row” aria-label=”subject area”><div class=”col-md-6 form-group”>[text* your-subject class:form-control placeholder “Subject *”]</div><div class=”col-md-6 form-group”>[tel your-phone class:form-control placeholder “Phone”]</div></div>
<div class=”form-group” aria-label=”text area”>[textarea* your-message class:form-control placeholder “Message *”]</div>
<div class=”form-group” aria-label=”Submit button”>[submit “Submit”]</div>
[response]
</div>

As i undestand, the code must have elements. Since i am not familiar in coding and my developing skills are limited, can you please help me out? Any advices? Thanks in advance. Nikos