UFC Fight technical help

I have had it from day one but the Last couple of events I have been trying to log in from my iPhone or iPad which are the only two devices I have ever logged on from. It lets me log on from my original (and only account/email) I have ever made. But when I click on the live link I get a message that says. 


“The purchase is already linked to another account, please login with the original account to access this content” 


sorry if this has been posted before I did a search from the app before making the thread but couldn’t find anything.