"The problems suffered by British energy consumers are not a closely guarded secret," Allan Asher, chief executive of energywatch said.
"When Britain's energy market liberalised it was assumed it was in suppliers' interests to sell their products responsibly, transfer new customers smoothly and bill their customers accurately and regularly.
"Unfortunately for consumers, these assumptions proved to be mistaken, and we are still trying to sort out many of these problems a decade later," he added.
From July 1st, every consumer across Europe will have a choice of gas or electricity supplier - as the EU attempts to give every European the right to choose who provides them with their energy.
Click here to run an energy price comparison, and see if you could be paying less for your gas and electricity.