It's been a bit of a pain all along. The original changeover date came & went without anything happening. I chased it up and apparently they'd tried to call me but couldn't get through and so cancelled the whole order. Nobody thought to try emailing or anything
Revised changeover date came and hurrah ! It worked. That was 10th Sep.
Late morning last Friday - the 20th - an OpenReach bloke turned up out of the blue and said they'd identified a problem with the line and he'd been sent to investigate. He found a broken wire in the master socket. My fault as I'd been mucking about with stuff, but the internet was working so I'd not realised anything was wrong. He fitted a new master socket, did something in the cabinet down the road, and said we'd be offline for half an hour. Half an hour (ish) later we were back online and running faster than before. Yay.
Late afternoon last Friday we went offline again. I can access the modem/router, the DSL connection is up, but the router is not getting an external IP address.
Saturday morning I called support and spent an hour talking to a chap who seemed to know what he was talking about. He spoke to OpenReach and determined they had an outstanding action on my line. They promise to fix things within two working days. Seeing as this was Saturday morning, two working days obviously means four days, end of Tuesday
Tuesday afternoon I decided I'd better call them again to see what's happening. After just over 45 minutes on hold I got to talk to someone who advised me to turn it off and back on. That didn't work, of course, so she advised me to do a hard reset. That didn't work so I was passed to someone else who, get this, advised me to turn it off wait two hours and then back on. That didn't work. But true to his word he called me back to check, and advised me to wait another couple of hours to see if it would connect. Nope.
So all in all yesterday I spent about two hours on the phone being given various versions of "turn it off and back on".
I'm now waiting for another person to call me back. Not holding my breath on this....