Same here, did support chat and got the code right away. I didn't have to include a sreenshot of the email, the support agent just looked into my account details then came back with the code. I used the code and I'm downloading the PTS now.
Same happened to me today received the invite for 1.8 pts but no code in my Ubisoft or email gamer tag spallday85 BYOB
GT is rock master 89
Hi same thing got the invitation, but no code. Xbox Gamertag:Blankie
Same, contacted support hours ago and chat never loaded. xb gt: ImKitting EDIT - tried again and chat worked. support took care of it in a couple min. good on them!