There is no need to beg, a support ticket within 30 days of purchase will get a refund just by asking.
https://fantasygroundsunity.atlassia...stomer/portals
The FG Update mechanism is the only means for downloading, and I believe all the items are protected in the Vault so you can not use them outside of FG. Have you tried running an Update in FGC and seeing if they download for you? They obviously won't have LOS and lighting, and the ones that are tiles will be of minimal use, but I think they will download and you can load them into FGC. But, haven't tried myself.