Just Energy high prices added to bill

Just Engery came to my door saying they would save at least $500.00 or more a year if I signed with them and they will put me on equal billing. Which never happend. There was no mention of a contract fee or cancelltion fee. He said I could cancel at any time. The sales man also came with prevous bills stating he was representative for Just energy partnering with Halton Hills Hydro and Union Gas. He never mentioned a 5 year contract. I have called on several occations and I am told I signed the contract and they still stay I am saving money. Which is a crock as I am paying more now then ever before.