EA Staff (Retired)unfortunately, just because there are remnants of data are still found, it doesn't mean your account can be restored. Unlinking doesn't necessarily destroy the entire account, but it can happen and unfortunately for you, this is one of those cases where the account has been mostly wiped through your unlinking action. If Support already checked your account and told you that there is nothing they can do, then that is sadly the case.
We also don't have access to account information here in the forum, so there is nothing we can do to help you here with this issue, as your problem stems from your account, which only support has access to.
Here is the article on unlinking accounts, where the risks are explained again. As you can see there, it is always recommended to start anew on a different account instead of unlinking, as it can lead to a lot of issues for Apex Legends.
How come other games and game companies have come out with cross progression without having this sort of problem? It took EA a very very long time to come out with this service and when they did it did not even work for people. I feel like something should be done but like you did say we did agree to the risk of losing everything. It is just very frustrating because I also lost everything that I had pn my account including heirlooms and rare skins, what over 7000 hours fo playing time had gotten me.
How have players gotten coins and heirloom shards for less crazy situations regarding account data , it’s genuinely disappointing
