WooCommerce plugin modification

I hired one developer to make some modification in Woocommerce plugin that works with Wordpress, the name of that plugin is ebay-aliexpress-wooimporter. I use this plugin to import data from both sites Aliexpress and Ebay with my affiliate API and cache in my database to publish it on my website. The developer which I'v hired did a good job, he extends the amount of data that the plugin was intended to import from 10200 to the maximum available data. We do not work together anymore and I have some issues that I want to fix: 1- the plugin shows the max data bx. for a category that I want to import say 15000 I find that not in all cases that the plugin didn't cache that amount it cache lesser than that. 2- the plugin in some cases stops caching and when I restart the caching again it does nothing. 3- I want to be sure that the plugin will update regularly taking in account that the plugin has that option to update. 4- I want to speed up the caching because I have to cache too much data. If you will succeed to do that job I have also another plugin to modify after this one and I'll publish the project for you. There is a lot of ongoing work that must be done, it can be a long term relationship The max budget for this part is $100