Enter their page and on the left panel click there and find support, to make contact.
Once you open the box, enter the message type.
There is a box to select the game, skip it because our game doesn't have it in their list, but that's okay because the message goes anyway just fill in the things that have asterisks like this * lol.
I already sent mine but to reinforce send yours and say what the name of the game is - Delta Force Xtreme will not put a mod name ok.
Here is the photo confirming the sending of my message successfully.
https://www.thqnordic.com/company/contact