Internet service provider Big Blue Sky is at the centre of a storm after customers swamped local council officers with complaints about its service.

Trading standards officers are quizzing staff at Lanark-based Big Blue Sky after they received over 250 complaints about the ISP's unmetered internet access service.

Peter Sherry, South Lanarkshire council consumer trading standards manager said: "Some customers have paid up to £35 for a year's unmetered access but have been physically unable to log on to the service."

Reports suggest that the ISP's service has been oversubscribed and that some customers have been misusing the service.

A statement on Big Blue Sky's website says: "Serial misuse of the service by multiple logins has contributed to the problem." Sources explained that genuine customers have been unable to connect to the service because some users had been sharing their passwords with other people, causing congestion.

Jacquie Attwood, a Big Blue Sky customer since March, said: "We've had severe problems trying to connect to the service for about 10 days."

She added: "I feel sorry for the customers who signed up in the past few weeks."

Big Blue Sky's service is currently suspended and staff have informed trading standards officers that the company has ceased trading.

Trading atandards officers have not been able to contact Big Blue Sky's director David Singleton. Sources claimed Singleton is currently in either the US or Sweden.

Big Blue Sky staff told trading standards officers that they expect Singleton to return to the Lanark offices on Thursday. Trading standards officers are due to return then in order to question him.

PC Advisor understands Big Blue Sky staff are planning to refund money to customers who have not been able to access the internet since signing up for the service.

A spokesman for Companies House confirmed that company director Julian Paton resigned on 25 June.