Thanks very much Aragorn.
The bloke that came out changed the modem for a new one as I insisted, because I was having so many problems that couldn't be solved by him. He was obviously not happy and in the end said "well, it's NTL paying for it, not me."
I just hope if I have another problem that it won't be him that comes out to it again as he was very cocky and patronising, spouting a load of data and figures at me, knowing full well that I didn't have a clue what he was on about.
To be honest, when I reported the fault(s) and got the call centre in India, I would like to have said that I didn't want this particular man out to me again, but I knew they couldn't have done anything about who came out and of course it was sod's law that he arrived for the second time!
Carrie