Missing Landscape Material Pack

So I got credit through on my unreal engine 4 account, and bought two things on the market.
The first was Barrels and Cans models, which is working perfectly.
But I also bought a Landscape Material Pack on the market, but since I have tried to sync it directly from the market place, it has vanished and is not visible in the market to me anymore.

I have the receipts for it in the attached screenshots.

Exact same thing happened to me today after buying this pack. Perhaps it was taken off the store for some reason?

They already answered this here actually:

Turns out it was released a week early and they will give refunds.