[hotscotchbonnet]

It seems to me that NTL routinely overcharge customers and offer to credit the difference back against future bills.

Say they overcharge you £15 and keep that for a month and return it later.
What they are asking for is an interest free loan.

Say they do this to a 100,000 customers (not many in a nation of phone users). That is a 1.5 million pounds intererest free loan. That money is not floating around in the ether - it is is NTL bank accounts earning interest.

£15 loss to you and me is thousands of pounds profit to NTL.
We don't have punitive damages in the UK, so the small percentage of customers that go as far as court may cost NTL maybe a few thousand pounds here and there in damages. Overall, however, they are not going to really lose out. They have no incentive to really address these issues.

Personally, I am taking NTL to court. My case is a little different, but its the overchaging that i am interested in.