Can't get access to TNT-Sport

[Wroetoberg]

I've recently switched from Sky to BT and have bought a 150Mbps WiFi as well as the Big sport package. The weird thing is that I can access Now TV to watch the sky content but not the TNT sport channels or the Discovery + app. When I try to access any of the TNT sport channels I get the error message BTP-11169. 

I've tried many ways but still can't get it to work. pls help

[Wroetoberg]

I also want to add Now boost to my BT plan but it says it can't process the order and forces me to cancel it

[imjolly]

You need to wait until first order shows as completed in MYBT before you can start another order

[Wroetoberg]

I've sorted out the Now TV upgrade but I still can't access the TV channels and can't watch them. I can however watch them on Discovery + now