I have been trying to claim the Noweyr Mount since last night. I have completed the process at least three times, unlinked and linked, submitted 2 tickets and still no mount. Both tickets got the SAME answer and when I follow up I get nothing. This is what I get:
The first Twitch Prime ESO promotion for the Noweyr Steed and Pony is available for PC/Mac only.
Link your ESO and Twitch accounts (PC/Mac only)
Get Twitch Prime with Amazon Prime
Visit twitch.amazon.com/esoand click “Claim Offer”
Log in to ESO and find your new mount and pet in your Collections menu.You can find them in both the North American and European servers.
This promotion will only be available until September 27, 2019 so don't wait to go claim your reward!
Only one Twitch user on a Twitch Prime account will be able to claim the reward.
Note: You will be able to access this content in all regions you play the game. Twitch Prime is not available in China, India, and embargoed territories.
The Elder Scrolls Online Team
Notice the part about only one twitch account user on a twitch Prime account part? This is the ONLY thing I can see screwing me up, BUT this was not stated on ANY other postings including the official news release. To add this in afterwards is just plain wrong. But, just to play along, I removed myself from my husbands Prime account, clicked on the free trial and authorized everything and got all the same "claim successful" messages, but still no mount in game. I have 2 tickets with screenshots and follow up "waiting for agent"