Hey @JollyGiant and welcome to to the community and thanks for taking the time to post your issue on the forums.
I'm sorry to hear of the issues that you're having with the TV Go app, I would be able to assist you with this by resetting the devices associated to the app, you would have to re-add all the devices that you want to use the app on. If you would like me to do this, please let me know and I will send over a private message, so that we can get you passed account security and get this done.
Regards,
Steven_L