Had you received that email on the 29th of July? If yes, then the free spins were credited to your account by giving you a reminder about the deposit bonus. The welcome deposit bonus doesn't have any expiry date. You can get it on your first deposit after creating your account. Therefore, the timer in the email is related to the expiry time of the free spins which you have received.

I got email about the welcome deposit bonus two to three times from Betpanda before making my first deposit. None of them were showing the countdown timer. In my mailbox, I can only see the countdown timer on those emails which are related to the free spins offer.