Utility Warehouse Threatening Letter

hybrid

Hi all

I moved to a new property in August 2012, with no previous gas/electric accounts. The property had previously been supplied by Utility Warehouse, but, as I was moving in new, and have heard horror stories from Utility warehouse, I decided to phone nPower straight away.

I gave nPower the meter reading correct as of date I moved in. They told me it would take six to ten weeks to migrate, but we set up a direct debit asap.

During this period, the previous occupant was still receiving Utility Warehouse letters, which I forwarded to the landlord. Don't know what was in them, but their logo was on the front.

Four weeks ago, I received a letter saying we had been migrated and nPower was now my supplier. I have paid them three months direct debits. However, two weeks ago, Utility Warehouse sent me a letter saying that as the previous tennant was a Utility Warehouse customer, I am automatically a Utility Warehouse customer (they must have got my name from the landlord). The letter stated that as I have been using electricity, I either need to pay them for what I have used before they will let me migrate to another supplier, OR they want me to pay £100 up front before I can set up a direct debit. I ignored the letter because I was an nPower customer.

They have since sent threatening letters saying they could terminate our supply unless we pay. What should I do??? have they got any rights? Should I call nPower?

Thanks in advance