"This company is a scam. When we moved into our flat we were with spark energy for 12 days, we were sent a bill and paid it. We then changed suppliers. \r\n\r\nSpark has since pestered me saying I owe them money even though I have changed provider. They have sent my details to a debt collection agency after multiple phone calls where they stated I didn\u2019t owe them anything. Customer service are extremely rude and unhelpful. I asked to speak to management to discuss my issue and they blocked my number. \r\n\r\nI have sorted it with the debt collection agency yet they CONTINUE to send me emails"