Summit Energy reviews and complaints

I do not have any bills in my name. My life crashed 3 years ago and I am still rebuilding it. I have been on social assistance for the past 3 years. I would like to know how somebody in my horrible situation can possible break a contract with a company called summit energy and now am being billed $495 dollars. the enbridge bill is not and never has been in my name. I rent a room in the basement utilities included.
I called them on the phone about this and they claim that I signed this contract. I have no memory of any such thing. We get so many knocks on our door for soliciting it's impossible to remember them all. I asked them how I can be responsible for something not in my name. They told me that I said the bill holder was my spouse. Well she was my spouse 3 years ago. She was not and hadn't been for 2 years when I apparently signed this contract. We were not even ever married. Our names do not match in any way. If I did sign this contract is it possible for Summit Energy to come after me. It was not me who was cut off of the gas. The gas is even back on. That don't matter. They are trying to tell me that I still have to pay them $495. Can they really do this to me? The point is NEVER SIGN UP FOR SUMMIT ENERGY WHOEVER THEY ARE.