called twice in less than an hour, left no messege

Keeps calling, doesn't leave message, i called back, they wouldn't pick up, goes to answering service.

I also got a call from this number.  One yesterday and one today.  I was unable to pick up at the time, but they don't leave a message and when I called back, their answering service is said to be "full."

This phone number is someone calling from Summit Energy, or Summit Gas - they are trying to get you to use them instead of your current supplier - likely Enbridge. I had read up on them abit and it seems no one really has anything nice to say about them. They came to our door - THE DAY WE MOVED IN to our new house (june 27th) - and were VERY misleading - the guy told my husband he was with Enbridge and my husband signed the papers (just trying to get the guy out of the way so we could continue moving in). I worked for a phone company that used to do that when Bell first lost the rights to the full market - and knew it was a scam. I got my husband to call and tell them to cancel it right away - they said someone would call back in ten days.
A guy just called me 5 minutes ago - I told him we were not signing up - they were misleading and he tried to change my mind. I had to tell him 3 times that I was at work and would call him later - he said he would call me and then I hung up.

The exact same thing happened to me!  A guy cam to our door the day after we got possession of our new home.  He said that he received notification from Enbridge that we signed up as new clients and he was there to register us for our bill.  I also signed the papers not knowing exactly what it was all about.  I tried cancelling it too but had to wait for them to call me back in 10 days and when they did the guy on the phone was really rude and would not cancel the plan no matter how many times I told him to cancel it.  Eventually I had to give up and hang up like you did.  I'm told that as long as we do not give oral confirmation of the agreement it will not become active and it will not appear on your gas bill. I wish I had been warned before all this happened!