Smart Energy One phone scam Gaithersburg Maryland

I received a phone call to ask me for my Washington Gas account number, the person on the phone told me that they needed the number in order to give me a discount that I was entitled to. But after a few days I received a letter from Washington Gas that my gas supply had been changed to Smart Energy One----I did not authorize such change. I checked online and found many complains about this scam (the gas bill will significantly increase). I called Washington Gas and was told that I had to call Smart Energy One -----their listed customer service phone did not answer and I called another listed phone, the person on the phone agreed to switch me back. Law enforcement agency needs to something to stop such harassment and scam!