Remove REVIEWS button

Add this to your CSS

.woocommerce-tabs ul.tabs li {
display: none;
}

There also might be an option to remove it in your theme (plugin)?

To which CSS file please? And will that just remove the REVIEWS but keep the SOCIAL?

To your style.css.
You can add it by using Custom CSS manager plugin so you won’t lose the changes you made when you update the theme.
Yes, you will keep the Social part.

thanks heaps will try now

worked perfectly – thank you!!