Distorted layout

HI there,

I have installed the plugin on my site and it caused us quite a havoc. It ruined the layout showing only the header and a scroll in the whole website and on any link I click. I have tried deactivating and deleting it but the website is still the same now and I really can’t do much as I had no backup with the last modifications I did before the install.

Would very much appreciate any help from any one.

Thanks

https://wordpress.org/plugins/woocommerce-product-category-selection-widget/