WordPress Developer needed for custom adaptations in WooCommerce store (Ref.: KB)

We have a site made in WordPress, it's a WooCommerce store that sells wedding products. We developed a Wedding Lists functionality where the married couple can create a list of gifts with products from the store. We work with the TI WISHLIST WooCommerce Plugin ([login to view URL]) and a developer made the necessary modifications to adapt it to our needs. There are some bugs and also our client requested new changes to this section and we need to finish some points that were pending. What we need to do: 1) Something is wrong in the Wedding List section because you should be able to see all the public wedding lists of the site and actually they are hidden. This is caused by an error in a part in the code of the TI Wishlist plugin where is defined the expiration date of the lists (7 days after the wedding). This was working before but I don't know what happened. I think the plugin was automatically updated and some of our customizations were overwritten 2) Actually the button "Añadir a lista de bodas" (Add to wedding list) is showing in each product of the store only if you are a registered user but our client wants to make it visible only if you have a wedding list created. If you don't have a wedding list you shouldn't see this button on the products. 3) Actually if you want to buy a gift for a couple you have to enter the wedding list section and find a product listed in the list to buy as a gift. When you add a product to the cart from a wedding list, the billing address should be autocompleted with the couple address to send it to them. But this is not working well because we use a payment method that overwrite this field in the checkout and also we have a custom shipping city field as a dropdown to use with out custom delivery method. Our client want now to add the possibility of buy any product from the store (not only from the ones listed in wedding list) and buy it as a gift for a couple. So I think the best way to solve this two situations is adding a dropdown in the checkout when you can ask if the user is buying a product for a gift and then he could choose the couple from the public wedding lists of the site so the store can send then this product to them instead to the original buyer. 4) We need to add an extra field to upload a photo of the couple when they are creating the list. This will be the thumbnail image for the list in the wedding list section. Our last developer started with this but he didn't finished this task. It's important for us to be able to update the WP core and WooCommerce plugin after this customization.