Mass Effect 3

Since EA closed the Origin site this year and transferred everything to "EA Games"  I've been unable to load Mass Effect 3, at all.  I get a message that says 

'We could not activate Mass Effect 3 on this computer using the account your provided. Please locate your product key to activate the game using your Origin account."  Then there is an "Enter Product Key" button that when pushed goes to another error screen presumably because Origin is not around anymore.

Nevertheless, I can't get the game to load.  I was able to Play ME1 and ME2 but then it wouldn't load any of my previously purchased DLC.  VERY FRUSTRATING!!!!  I've already contacted Tech support and have done literally everything they asked, with no change.  I'm also getting the same error messages with all of my other EA games I purchased from the now defunct Origin: Dragon Age series, Dead Space series, Battle Field 3, etc. 

ANY SUGGESTIONS OUT THERE????