Modification to existing import module - Prestashop

Avg Bid (USD)
Project Budget (USD)
$30 - $100

Project Description:
We have a Custom Import module, but needs some fix.
it looks like this

it is important to have experience with prestashop and its structure.

1 - Re code the button "import new categories" it has to to import categories from a csv table into prestashop.
2 - "Update Quantity" button (currently it only update the quantity and wholesale price) but it have also to to update the 'retail price' for the products
3 - "Add discounts for products" button currently do it's job, but it has also to remove the discounts if they don exsist
4 - Delete, Activate and Deactive button not working
5 - We have a feed, but have to be modified:
a) The have to be parent category and sub category
b) add 'from=&kelkoo' to the end of the product url
6 - Possibilties to let people search by 'product ID' & 'Supplier refrence' & Ean in the search field for both backend and front end.

The work have to be done asap.

Skills required:
HTML, MySQL, PHP, Prestashop, SQL
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