Someone who can review a code from a plugin prestashop

Hello.

I work with one payment processor, and i have a lot of bug coming from my payment gateway. They gave me a plugin prestashop, i'm pretty sure is not well code, i don't know if anyone of you can review the code and tell me if it can be improve.

I'm not sure it's coming from my processor directly or from the plugin. But there is some flaw for sure.

I will pay someone only if the problem is resolved will pay a good price because i'm losing conversion because of the bug, but i will pay only if the plugin is improved.

I need an expert in this kind of thing.

Thanks

up still didn't find the expert i need thanks