I switched to Unplan Entertainment yesterday, from Bigpipe.
I could not do it online - Bigpipe is not recognised as an ISP to switch from, and even if it was, Bigpipe do not use account numbers.
I called up, and went through all the questions, credit check etc OK, then when asked what my account number and losing ISP was, she got stuck.
SHe had to go away and find out from somewhere else how to do it with Bigpipe (she didn't even know what Bigpipe was, and was a little surprised when I told her Bigpipe was a Spark company).
She called me back a couple of hours later to tell me it was still being discussed and she was waiting to hear back from the switching team. Half an hour later she called me back and it was all sorted.
Funny how difficult it was switching from one Spark ISP to another. You'd think that'd be the easiest.
CSR was excellent by the way.