I moved fibre ISPs the wrong way about 3 years ago.
Cancelled my old ISP with the required notice for a particular date.
Arrange to join Skinny on the same date.
Old ISP disconnected me at 9pm on the requested date.
Rang Skinny at 9am the next morning and explained what I had done.
Skinny had me connected again by 11am. Pretty good fix for my stuff up.
Downtime about 14 hours.... used my phone for internet.
I have followed the Bigpipe ISP switching guide since.

