response after 4.5 days of silence:
"Hello!
Thanks for letting us know the situation. Our sincere apologies for this inconvenient with your items. But no worries, we are here to help.
First of all, we would like to guide you through the next article in order to try the basic troubleshooting steps:
Killing Floor 2 - Item or inventory is Missing - Purchased and Earned
Then please, let us know the results as soon as you can. We will be pending for your reply.
Best Regards,"
It not working,
still missing most of DLC