Watching TNT Sports on a Smart Phone App

[jimbojimbo79]

I have TNT sports as part as my Sky Stream subscription since February this year. To watch sports on a Smart Phone the route is to link the Discovery+ app to the SKY account which I have done. When I try to watch TNT sports via the Discovery+ app the app says I need to buy a pass that is around £30/month despite me being subscribed already. Sky was aware of the problem when I spoke to them a few months agao, but it hasn't been fixed. I tried to call Sky many times this week but they don't answer the phone EVER. Does anyone have a solution to this problem? Thanks