The saga continues.........
Shortly after my above post, I emailed Vas Agridhiotis (one of the directors) with the whole story. Soon after, I had a reply from his assistant saying somebody would ring me from Customer Liaison. Hmmmmm........
Amazingly, I received a call a couple of days later from a chap called Ken Dugdale. Not sure where he's based, but it's a '0161' phone number. He was a very nice bloke, & we went through everything to correct the numerous cock-ups. At the end, he agreed to credit a month's TV/additional box/broadband totalling £62. Fabulous, I thought.
I received some mail today. The first one had all the correct charges, dates, credits etc, & was actually sent to the correct address!
Then they had to go & spoil it all (almost breaking into song there). The other letter was for my old (much cancelled) account trying to charge me for TV + additional box again, SENT TO MY OLD ADDRESS

.
Give me strength
Rang Ken Dugdale back, but he's on holiday - expecting a call back tomorrow.
On & on & on..........
NB as a Leeds United fan, I'm used to frustration & disappointment, otherwise I think I'd have broken something by now