Moles or voles or whatever it is?

These little critters are taking my tomato plants, large plants, my watermelon plants and whatever I try to grow in the earth using planter boxes, cages, anything if it is connected to earth. They drag the plants underground and leave a pile of dirt in their place. Not a nice trade to me! This is being done to my yard leaving sink holes everywhere and killing grass in tunnel lines. H E L P !!!!!!! What can I do other than move from this place?
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