Add-ons not appearing in My collection

Hi all!

I have not played the Sims 4 for a couple of months and decided to replay it today. I noticed when I opened up the origin app it was directing me to install the EA app as Origin would no longer be in use for windows. I did so, and downloaded EA and watched as it said information from Origin will be transferred over to the EA app. I logged in and checked in My collection and began loading up my game. A pop up told me in Sims 4 I needed to change from 64 to 32 (or vise versa) on I'm not sure what. I clicked OK and ignored this pop up and went to my saves. When I went onto all my collections of saves, It told me I required expansion packs which to my knowledge at the time, I already had installed.

I closed the game, went into the EA app and clicked my collections. Sims 4 was there however, when I clicked manage add-ons nothing was there except The Sims 4. I sent an email out straight away to EA in fear id have to re-purchase all of the add-ons I have already previously spent money on. They told me to clear the cache (I'm no PC expert so I have no idea what this is) but I followed the steps accordingly. 

After doing so, I checked my collections> manage add-ons but to no surprise they still weren't there. 

I've tried repairing the Sims 4 , taking my mods out of their folder just incase it was that but nothing seems to be working. Like I said I'm no expert in PC's so I don't really understand what's happening but I'm totally freaking out from how much money I have spent on the game. I feel let down by EA as their transfer from one application to another could have been a lot more organized.

Any tips?