Since 3.4 I have a gray calendar icon and received no pet.
In your ‘3.4 known issue’ you wrote it is fixed but it is not.
I have re-installed 3 times (playing on Android).
I have linked another account on my tablet and that account got free pet and calendar icon but not my main account. That looks like it is not a problem with my tablet.
(Submited ticket 58511)