How do i change "name" of my trade? Or how do i delete my trades?

This is not possible, why do you want to change the topic title?

Not directly title, but description. I wrote that this will be auction, and set wrong date. Want to change that, or delete trade soo i dont spam with one same trade with other description only - and dont want ppl to bid att wrong auction if i make second with same items.

a trade mod can edit it for you, but i doubt they actually will.

but you can ask them to close the thread so u can make a new one.

How do I ask them than?

"leg by: Trade Moderator, Trade Assistant"

prob click one of those and pm them. What i usually do if I need a topic edited.

Gl

If you do still need assistance, feel free to pm me.