TalkTalk has failed to improve its standing on customer complaints in Ofcom's annual survey - the broadband provider has come bottom of the table for the third year running.
Its customers were most likely to be unhappy with the outcome of complaints.
A spokeswoman for TalkTalk said the data showed an "improving trend" on the number of complaints.
Also: https://www.bbc.co.uk/news/business-48351900 says......TODAY, MAY 2019
TalkTalk data breach customer details found online
"The customer data referred to by BBC Watchdog relates to the historical October 2015 data breach. It is not a new incident," the firm said.
The BBC consumer show investigated and found the personal details of approximately 4,500 customers available online after a Google search.
The details included full names, addresses, email addresses, dates of birth, TalkTalk customer numbers, mobile numbers and bank details for thousands of customers.