WooCommerce Variable Product links & behaviour

Hello,
On my WooCommerce+Enfold site I’m trying to build a pricing table, and I’m testing a series of WooCommerce Variable Products I’d like to sell through my site.
In order to show all the product variants on the same page (I do not like the default dropdown menu), following WooCommerce rules, for each “buy” button I was forced to use a basic URL structure as follows:

https://www.mysite.com/?add-to-cart=1234&variation_id=5678&attribute_pa_format=name

However, using this method, after a click on the “buy” button the buyer is being redirected to the home page, while I would like very much to keep him/her on the same product page, possibly showing the top box “XYZ product has been added to your cart”, as in your single product demo page:

Using WooCommerce variable products, is there any method to update the cart without leaving the page from where the order has been made? Please see my test page linked on the private content area of this post. The basic pricing table with the standard links is the first one from the top.

Thanks!