[2021] Problem authenticating ownership with the game and can't get in touch.

I got the game gifted on my account on steam, then when i opeend the game i was apparently playing on a different ubisoft account, it as my brothers who had the deluxe version. then i log out of uplay, try to log into my own account and then play rainbow six but i cant cause it keeps saying theres a problem authenticating my ownership. i tried making a new account for uplay but it wont work. i'm out of options here and i cant get the purchase history nor the activation code cause steam doesn't show them as options.
now the main problem here is that i haven't really connected or opened a ubisoft account prior to this, I the first time i ever opened r6 i got this bug.

I've tried multiple times to get into contact with customer service but i cant at all, live chat is constantly turned off and when i did submit a ticket, its been a long while and still no attention to it.