TalkTalk is the UK's most complained-about broadband service provider, according to new figures from Ofcom.
Between January and March, it had 0.56 complaints per 1,000 customers, while Sky's broadband service attracted the fewest complaints at 0.15 per 1,000 customers.
TalkTalk was also at the bottom of the table in the landline market with Virgin Media at the top, attracting 0.72 and 0.16 complaints per 1,000 customers respectively. This is the sixth consecutive quarter in which TalkTalk and Virgin Media have finished bottom and top of the landline complaints league.
Dominic Baliszewski, a telecoms expert at Broadbandchoices.co.uk, said: "Ofcom's latest complaints data has shone a light on the ISPs who need to be working harder to keep their customers happy, but there is good news too. Sky has reduced complaints for every consecutive quarter without fail and Virgin Media consistently keeps complaints to a minimum.
"TalkTalk is making good headway, but is still struggling with historical issues following the buyout of older providers."
The Ofcom report also revealed Three as the most complained-about mobile provider.