Write to us.
There is no support desk and no ticket queue. There is an address, and a person who reads what arrives at it.
The address.
Anything: a match that went wrong, a rule that made no sense, a page that broke, a question about the company, or the opinion that something here is bad. Being told early is worth more to us than being told nicely.
We are not going to promise you a response time we have no one rostered to keep. What we will say is that nothing arriving there is filtered into a queue — it is read.
Who you are writing to.
DUELS is registered in Denmark under CVR 46451813. That number is public and resolves to the registered owner in one search at cvr.dk, so you can establish who is on the other end of this before you write.
If your question is about how the product works or whether it is licensed, those are answered in the open first — try the FAQ before writing, and if the answer is not there, that is a gap worth telling us about.