A company which offered a nuisance call blocking service has been fined - for making "aggressive cold calls" themselves.

Point One Marketing, trading as Stop the Calls, offered customers a call blocking device for their phones, as well as removal from cold-call databases.

But following hundreds of complaints, the Information Commissioner's Office (ICO) found the company had marketed the services through "aggressive cold calling".

Some complainants reported sales staff "shouting at them" when they declined and asked not to be called again.

While one claimed her mother, a dementia sufferer, had been pressured into providing credit card details.

The company, formerly Conservo Digital, was found to have called people registered with the Telephone Preference Service - indicating they did not wish to receive unsolicited sales or marketing calls.

They also ignored requests from others to stop the calls, sometimes calling repeatedly on the same day.

The watchdog said the Bournemouth-based firm breached the Privacy and Electronic Communication Regulations and fined it £50,000.

ICO head of enforcement Stephen Eckersley, said: "This company lacked integrity.

"They tried to sell a product that they claimed would stop nuisance calls, knowing full well they were responsible for so many such calls themselves.

"That they operated in what appears to have been such a bullying, aggressive way only makes matters worse."

The latest fine comes after a government clamp down on nuisance calls.