Your persistence got me curious. I do not play on PC, so I hadn’t seen these DLCs until now.
Here is what is says:
- It says the contents of the dlc are not tradeable or refundable.
- I do not see a promise that the items will be part of the respective sets, but I agree it is a fair assumption given the names.
I don’t know if this page looked the same more than 6 months ago when you bought the dlc, but by the looks of it, I’m not optimistic anything will happen.
If you don’t get a compensation, I hope you will at least learn a lesson from the whole situation.