Fixing a Problem on a Wordpress / WooCommerce Website

I am looking for someone to correct some errors that were caused due to latest Wordpress update. I have had problems previously with plugins that stop working correctly when work has been done on the website or updates done so must have a lot of Wordpress/WooCommerce experience as well as of working with plugins. The problem I have now is with the Microsoft browsers - IE/Microsoft Edge Banner does not display full size Filter By Price in Left column (on product pages) displays incorrectly. It shows boxes, it should be a slider (as you can see on Chrome or Firefox) Currency does not change when you select a different currency. Product Options - when customers select a size/colour and 'add to cart', an error message appears - 'Please choose product options…' and item is not added to cart so customers using this browser cannot buy from the site. When product options are selected (before clicking 'add to cart'), a message should appear above the main photo telling customers how many reward points they will earn on the purchase - i.e. 'Purchase this Product and Earn 0.17 Reward Points (€0.17). This does not display on Microsoft browsers. On mobile (Iphone and Android) Top section (social icons and product options on some product pages is pushed to the right. This does not happen on all products, not sure why. On Safari on the iphone, some products also do not allow user to select options - (same problem as with Microsoft browser when an error message appears - 'Please choose product options…'). On testing, some products do allow user to select options and 'add to cart'. Everything displays and works correctly on Firefox, Chrome and Safari PC so you will need to compare the website on one of these to see where the differences are and understand what I am asking. Website is: [login to view URL]