The EE app and web access to my EE account seem to work fine.
There are some things that work better on EE than BT and vice versa but still OK.
Indeed.
This transferring without one's knowledge/agreement seems to be happening a bit now and management don't appear to be doing anything about it. Seems they're happy to pay a bit of compensation to get their customers over to EE anyway they can.
I could have got back to BT but only by cancelling the order and then joining BT afresh with a new account and probably losing any discounts I had.
I'm most likely to quit EE at the end of my contract and find another ISP with more integrity and that's after being with BT for 50years.