This is so crazy.
From what I have worked out so far:
If anyone wants to downgrade/change their package, here is the link:
http://www.bt.com/downgrade ... Note you can add BT TV for free (£35 activation fee) and get BT Sport (full) for free for 12 months
However, if you "downgrade" you will be signed up to another 12 month contract. To get around that, follow the advice here:
https://community.bt.com/t5/BT-Spor...or-BT-Sport-for-the-15-16/td-p/1492621/page/9
Note; you get full BT Sport if you get BT TV... even if you cant watch BT Sport on BT TV in your area (this is what I have).
I can get BT TV, but it won't let me watch BT Sport as you need something called "multicast" enabled. To get them to add BT TV without changing BT Sport though, you may have to talk to them