https://www.bbc.com/news/business-55699033
"In 2017, Ofcom said people who only had a landline telephone were "getting poor value for money in a market that is not serving them well enough".
As a result, BT reduced the price of its landlines by £7 a month.
But campaigners are unhappy that "loyal customers" have still not been compensated for previous overcharging.
"Ofcom made it very clear that BT had spent years overcharging landline customers, but did not order it to repay the money it made from this," said Justin Le Patourel, founder of consumer group Collective Action on Landlines (CALL) and a telecoms consultant who worked for Ofcom for 13 years.
"We think millions of BT's most loyal landline customers could be entitled to compensation of up to £500 each, and the filing of this claim starts that process.""
"Since 2009, the wholesale costs of providing landlines to consumers have been falling by at least 25%.
But in October 2017, Ofcom found that all major landline providers in the UK had increased the line rental charges by 28-41%.
Ofcom strongly criticised market leader BT for raising prices, saying that customers were being given "poor value" for money.
It added that many of the affected customers had "been with BT for decades" and were more likely to be old, on low incomes and vulnerable."
So, is that 'over charging' or is there no such thing? A service is a service and they agreed to the price?