I am also having issues with activating my acct.
My old sky TNT acct is still active despite cancelling this.
The site ee.co.uk/tntsports does not take me to activate the subscription, despite being directed here by a Discovery employee from customer service.
They have now asked to go away and investigate and will get back to me.
This process should be simple, but clearly that's too much to ask for.
As always, companies like EE promise the world but make it so difficult for customers, even tech savvy ones. I dread to think how someone who struggles with tech and the online world would cope with this.
