Wordpress, ACF, WP All Import - Developer wanted

I need support from a Wordpress developer who has experience integrating ACF (Repeater) fields and the Wordpress All Import plugin. Here's the thing: I run a Wordpress website for product reviews and price comparisons. For this I use a theme that manages product and shop data via ACF fields. There is a CPT called Shops which stores the individual shops with the corresponding values in ACF fields and a CPT of the products in the individual ACF fields of the CPT. Now the prices of the individual shops are displayed in the frontend on the individual product pages in the price comparison. Now I want to import the prices via WP All Import via CSV and XML interfaces from my partner shops. Apparently there are problems because the individual values are stored in so-called ACF repeater fields. It works halfway with a shop. Unfortunately there are problems to choose the right field. And when shops are deleted or new ones added, it can be that the key field moves. That's why I'm looking for a STABLE solution for this application. Tasks: 1) I need an error free integration of WP All Import as import interface for these ACF fields and the shop solution in general. It must be taken into account that the import must continue to function when shops are created, deleted or changed. As with the products 2) I have already created wide ACF fields for coupon codes. These should be included in the calculation of the price in the price comparison if coupon codes are entered in the backend. 3) When products are edited, the imported prices are deleted from the ACF fields or no longer displayed in the frontend. This bug should be fixed. Please make me an offer to implement these requirements best at a fixed price. For your information: The website is operated in German.