The original complex metering was installed before privatisation and all ran well.
Privatisation meant, to retain the same tariff, I was forced to stay with nPower.
When the meter developed a problem, nPower unilaterally decided to ditch the complex setup and, without permission, only installed an E7 meter.
It took many months and the intervention of the ombudsman to force them to restore the original setup...
...except they botched the reinstallation, a fact I only found out a few weeks ago: 13 years after the error.
That error meant that instead of being charged the E7 cheap rate overnight for my storage heaters, I'd actually been charged on the full price tariff rate.
This overcharging was only exposed by the recent meter changes which eOn Next insisted I make.
When I compare my energy usage from before and after the recent meter change, there isn't a big difference.
But when I compare the cost, in the middle of winter,I'm currently on target to save between £400 and £600 a year, and that is AFTER the prices went up.
The only real change is the meter configuration.
I lodged a complaint with eOn Next and explained the situation repeatedly, but mostly I may as well have spoken a foreign language.
Eventually, they accepted there's been an error 'in communication' and offered £200 compensation.
They don't seem bothered that I've over paid by more than £6,000 since the original error.
They don't seem bothered that over £2,000 of that was paid to eOn Next since they took over from nPower.
And they certainly aren't interested in repaying any of the money I paid due to the energy companies error.
So, how best do I make them repay my money? How much of it can I hope to recoup? And how much compensation am I entitled to due to their error?
Any advice would be gratefully received, because at the moment, eOn Next have told me that even the £200 they've offered is more than I could hope to receive if I went to the ombudsman.