I lost my activation key for Titan fall

If you never installed it, I doubt there's any recourse to buying it again.  If you have previously given Origin that code number during an install, you never need it again.  It is a permanent part of your player account, and you can get a free digital copy, because the disks want to stop and register every time, and that makes for a conflict. 

I never used the code i need a new one is there anyway i can i have previously purchased it buy i lost the key before I could use it... i need a new one or some other way to install the game and be able to play it

Answer HQ is not part of EA's Sales Department.  We are a community of game players dealing in self-help here.  Try Help Center.  They do have links to sales that we do not. 

https://help.ea.com/ 

Ok thats all i needed to know thanks for the assistance i truly appreciate it!