HI Brigadier! Thanks for replying so swiftly. I have not checked my credit files yet, that's probably a good place to start. I think the account was addressed to the three of us, but I might have been the main point of contact - I was certainly the person dealing with the electricity etc. And no, I did not cancel it in writing, but requested final bill over the phone, as I have with every other utility account before. All the best, thanks for getting in touch.

Hi everyone, I was wondering whether you could help me with something that has been troubling me recently. I moved into a new flat in January 2011 and immediately wanted to change energy providers as we were with Spark, and I had been warned against them by my landlord. The flat was shared between 3 relative strangers who split the bills - however I dealt with the energy company. I called them and requested a final bill shortly after moving in. After many phone calls they sent us one weeks later - to the sum total of £0.00. We didn't take any action. About 10 months later, on the day that I was moving out, I opened another letter from them. It was another 'final bill' for a total of around £500. I asked my flatmates to take care of this, as I was leaving. About 6 months later - Spring 2012, I started receiving phone calls and text messages from someone alleging to represent a credit company. I was reluctant to take the calls, as I didn't recognise the number and they called within working hours. The text messages looked spammy - they were vague, mentioned credit rating and asked me to call them on a premium rate number. I thought little of them, until I picked up a call and they asked for my previous address and mentioned Spark Energy. I shrugged off whoever was calling me at this point - I was at work. I didn't progress with the phone call, and they didn't call me back after two conversations with them. I appreciate that this is all from a long time ago - but the reason that I am currently concerned with the matter and thinking about it again is because I would like to apply for a mortgage in the near future. I've always had a very good credit rating aside from this - 6 years of living independently with all bills paid on time, and no credit card. As I no longer live as the residence, and have had no correspondence from Spark since Spring 2012 - I don't know where to start. My questions are: How or should I find out if I owe anything? How do I found out if it affects my credit rating? I've searched the forums for other occurrences of complaints with Spark - it seems I'm not alone - has anyone else experienced the same problem as me? Any help is greatly appreciated - thank you.