I am a 4-5 year Rainbow 6 siege player on my Xbox who has recently switched to playing on pc. I created an entirely new Ubisoft account under a new email to continue playing on my computer, not knowing that I could have logged in with my previous Ubisoft account to continue my progress. Once a friend had told me that I could actually play on my old account if I just signed in with the old Xbox account under a different email, to keep the same progression I used to have (mainly bought operator packs). When I attempted to boot up the game on the old account used on my Xbox, I saw a message that told me all of the operator packs that I had bought when I played on Xbox, and that these would be downloaded onto this version of the game. After clicking continue, I was greeted with a new message saying "Error, we could not authenticate the ownership of this product". I messed around with the linking of both accounts to my steam, however nothing worked. I am wondering how I can play on the account that has all the progression that I had on my Xbox (the one that I am currently submitting this on). I have been told multiple times that this error only occurs when you are signing into the wrong account, however I am certain that I own the game on both accounts, and from what I know there is no reason that I should not be able to play on this account.
Last time I submitted a case about this issue, I was told that the only way to play the game, is with the account that the game was originally bound to, and if I want to play with my Xbox progression, then I'd have to MERGE the two accounts, and from what I know that isn't even possible anymore.
Every single time I try to contact Ubisoft support with this problem by submitting a case, they give me the exact same copy paste instructions to include Steam ID, an uncropped photo of proof of purchase and additional screenshots of the error and they will "get back to me", even though I had included all of those screenshots in the case that they were responding to. I'm honestly getting annoyed because at this point its like they don't even read the case, and provide me with the same instructions that don't fix the problem, and each time after updating the case asking for additional help, they don't respond.
I'm making this forum hoping that my problem can get fixed outside of submitting a case because at this point that will never work.
How do I fix this???