How do I install Spore on Origin if i own the Disc version?

I originally bought the game on disc, including GA, C&C, and the Robotic Parts. I uninstalled all of them when i heard you had to do this in order to redeem your code through Origin. After putting in the code it recognized the game, and then it said "this code has already been redeemed". 

I tried it through Steam as well. Didn't work. So i tried the link given on here: "https://myaccount.ea.com/cp-ui/redemption/index", which is supposed to lead me to a code redemption page, but instead leads me to a page that does not exist and If i try to go to my account settings from EA.com it tells me "could not load page; redirected too many times". 

So now im reinstalling the base game because apparently you can "You can also redeem the codes from CD/DVD, Steam or GoG directly in Origin if you have it installed and if they haven't been attached to an account already. " Im assuming what he means is that i have to install the game but not log in and then try redeeming the code?

The FAQ page for this is outdated. There is no "preferences" folder in my SPORE files, nor is there a "login.prop" file. This has obviously been changed. Apparently the problem is that i have my spore account on a different email and my Origin account has a different email. The way to delete my old spore account is obsolete and I need to know how to do it on Windows 10.