I thought it's just a creeper will be easy to remove by pulling it out, after few days it would again come up, so I dug up a little in order to remove the root system. It was storing food in the root in shape of bulb. After few days it showed up and I continued to remove them. Lately, I was preparing bed to transfer few herb while digging found a long stolon, I removed soil along it and found more bulbs of the same plant.
What is this plant, how to get rid of it, it's root system is spreading and growing underground?