Just because it broke no rules, does not mean it is supported. If the items can’t go in the trade window, then it is not supported. This means both sides trading things via trade window. For example, someone taking your crafting items after agreeing (using game chat) to craft something, would be a scam. You giving gold for a raid run, would be unsupported.
-You have to wait on the ticket. There is no dial in number and the forums are not a means to bypass the ticket system.
-If it was a supported transaction, you will get your mats/gold back - if the GM can verify it using game logs.
-if it was an unsupported transaction you won’t get gold back.
-You will not be told what happened to the other player.
Hopefully this is something they can help with!