Stop my plants being eaten

[bro101]

Honestly all that's left are green"sticks" I'm assuming slugs or snails. Most are annuals too. Any advice please?

Has anyone tried this stuff and does it work? Snails and or slugs have been nibbling at my cornichon plants and bean plants www.wickes.co.uk/Doff-Green-Fingers-2-in-1-Bio-Pellets-Slug-Barrier---1kg/p/256389?fix&gclid=CjwKCAjw2f-VBhAsEiwAO4lNeKGZMOuiyKwl6iIMpf_L01ZNRycx9A5IiO560_pzR1Pe35i9rDqE1hoCq_0QAvD_BwE&gclsrc=aw.ds