Создание плагина для вордпрес

The contractor got down to work, at the beginning everything seemed to go according to plan, he unloaded the visual part of the plugin, without the functionality, it seemed like the work was moving, but as a result, the plugin was not finalized, to be honest, I don’t understand at all whether there is any functionality there or is it just a shell (then that the performer attached to the plugin files correspondence) but the plugin itself does not work at all, or even if it works, it is clearly malfunctioning! Therefore, I invite an independent expert to test the work of this freelancer, because I can no longer wait, we agreed for seven days and more than a month has already passed, and I have not received an answer from the freelancer for a long time, although he is constantly online, screenshots of correspondence I attach.

https://prnt.sc/uu5e3j
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https://prnt.sc/uu5flc
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https://prnt.sc/uu5hg1
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https://prnt.sc/uu5ij0
https://prnt.sc/uu5jm6

I already wrote to you because I can't wait, I really need this plugin for my clients!!!