Traps are probably your best bet, place them at their entry point to your garden and bait the with what they have been eating. You can use live traps or humane kill traps most anywhere.

I have groundhogs living under my shed . Every time I block a tunnel they dig another one ! They chew everything. I'm so sick of them ! I've seen huge ones and young through the windows.

Model hawks / eagles on top of poles are reputedly effective against many small creatures.

I put in barbecue sticks cut in half sharp end up it doesnt take long for them to learn - however I don't actually know what sort of critters you have and don't even know what a ground hog is so hands up completely out of my depth and fallen into a big hole of my own making ! Good Luck by the way!

Rifle.

Fence the entire garden but the fence has to be 6-12 inches into the ground to keep the burrowers out. Coyote urine is available at hunting supply stores. A roll of barbed wire. A lion with adequate shade on a chain. A moat. A mine field. Watch towers with a rapid fire paint guns.

During the drought of 2011 in Texas I strung barbed wire at belly level to keep deer out. This was on the inside of a 5 wire fence, even. The deer had nowhere to land, safely. Then I strung another fence outside of that one. Looked like I was prepping for the Normandy Invasion!!

I have fences, I have 600 garlic plants and a couple of dozen Marigolds, wind chimes, reflective eyes and solar powered, motion activated lights; I put down blood meal and I turn on the sprinkler when the deer come near the garden - AND STILL THEY COME AND EAT MY GARDEN.
You can also try urinating around the edge of your garden or better yet getting a friends dog to do his business around the edge of the garden. Or just accept that you are going to lose a percentage of your garden to the wildlife.

I've read broken egg shells keeps snails away from plants . I've heard marigolds keep rabbits and deer away .