Hi, it is possible to link your Ubisoft account to your TRN account without changing the avatar. You’re shown an option to link via Twitch too, I’ve attached a guide below if that helps. Unfortunately Ubisoft doesn’t provide a method for 3rd parties to verify ownership of accounts, does add a little hassle, totally with you.
As for being able to link multiple Ubisoft accounts to your TRN, this isn’t supported for multiple reasons right now. Allowing users to sign into the desktop application with your Premium TRN account is something we will add soon though.
Just an FYI, you have access to Premium support, this is our forum. If you’re requesting your money back, you’ll need to contact support here: https://thetrackernetwork.com/contact