Discovery+ not accepting email address

[Smithm54]

I am trying to sign in to Discovery+ on my sky Q and it doesn't recognise the email address. I have spoken with sky who have confirmed the email address is correct and say they cannot assist as it is 3rd party app. I have also spoken to Discovery+ support who say they cannot help it is a sky issue. Discovery+ say they don't have an account with my email address but when I try and create a new account it says it can't because it already exists.HELP!!!

[lainys]

Good afternoon @Smithm54 , I’ve escalated your post to our Community Messaging team who will invite you to a private chat shortly and help you with this. 

Just look out for the colourful bubble to start the conversation. Please be aware conversations automatically close if there is no response within 48 hours.

Here's more information on how Community Messaging works - https://helpforum.sky.com/t5/Did-you-know/Escalating-a-post-to-a-Sky-expert/ba-p/3711147#M141