Small gas and electricity supplier Spark Energy is being investigated by regulator Ofgem after a flood of complaints from customers over the way it handles bills and customer switching problems. The energy watchdog said it had launched an investigation into Spark after receiving information about poor customer service at the supplier, which has just over 65,000 customers. Spark, founded around five years ago, was recently featured in a BBC Watchdog programme in which some customers claimed it was ‘impossible’ to switch once they were tied into an agreement with the company.....Read more here