Expansion No Longer Owned After Account Merge

I have attempted to reach out to support in all other ways I know how, so this is my last resort. I do not know why EA has made it so difficult to reach them for an issue that I most definitely cannot resolve without them.

I recently merged my account with another that had nothing on it for the Sims 4; I merged it to get my Sims 3 content onto this main account. After the merge, I no longer own an expansion that I purchased; Discover University. I checked my purchase history and confirmed that I DID purchase it 12/28/19, but it is prompting me to purchase it again. Restarting the app, PC, reinstalling EA app, and doing the app recovery cache clear thing has done nothing. I am begging for help. I am locked out of all of my saves as they rely on the content from this expansion to even function.