The DLC is sent out once per day and as long as you've fulfilled all the criteria you'll get it eventually. Please go over all the steps again as detailed in this thread and tripled check that you've done everything needed to get it.Still waiting... I'm really starting to think I'm not going to get it... going on 72 hours and nothing. I followed every step and double-checked everything.
https://forum.paradoxplaza.com/forum/index.php?threads/faq-parklife-steam-giveaway.1382852/
We are aware that it has taken more than 36 hours for some customers and this is currently being investigated. Feel free to fill out this Google form and our developers will check your account manually:
https://docs.google.com/forms/d/e/1FAIpQLSffnEY2ArDcaYFi-L4TGAFB0rBLuGw_egBftuR3hlUaX2l2sA/viewform
Don't worry, as long as you fulfill the criteria, you will get the DLC! Also, remember not do disconnect and reconnect your Steam account until your DLC has been granted as this will reset the 36 hour timer.