Need Php Edits on my Simple Wordpress Plugin

Hello, I have hired a developer some months ago to develop me a wordpress plugin. She made the delivery and left.
Now there are some problems with the plugin I am looking for some1 who can help me the fix the problems.

How plugin works.
Plugin creates articles with given keywords and rss source with OPENAI ChatGPT with parts and make a long article at the end with images.

But the developer filtered all the necessary html tags like Bold, italic, tables, charts, listings and other basic features whiel writing articles and the result is simple text with no rich elements.
The developer also used only gpt 4.turbo which is expensive and l want to use other protocols too.
The developer forgot to add google images, bing images and yandex images to search keywords and scrape related images.
the developer also developed the plugin in a way when we run the plugin it is generating ///////// codes in the promts.

You will fix these problems.

My budget is 20 usd.