Hey there,
They usually push out updates on Tuesday or Thursday around 12 AM CEST. Updates have to go through QA before they are brought to Live and if they don’t go through they need more testing, which means the release time has to be delayed by hours or days (which can happen multiple times in a row…).
I believe they still give a warning in-game (at least for official servers). Others have suggested they do this earlier before.
You can join the fan-made Conan Exiles Discord and keep an eye on the chat there - Ignasis often gives a heads-up, up to a few hours prior to an update. Otherwise, there’s no saying when it’ll come out, as updates are, as mentioned, generally made around coffee time 
They tend to stay away from the Friday patches since a while now, but when they can patch something they will consider to do so.
Conan Exiles does not provide MMO-like support. There are no refunds for items etc., but you can report a bug if you come across one. Be sure to follow the report guidelines.
I’ve moved this thread to the General Discussions subforum, as it provides general feedback. The thread will be seen regardless.