Transferred an erc20 coin to eth… now it’s stuck!

Ugh, royally f’ed up…

Transferred my FWB (friends with benefits) which is erc20 to my Etherium wallet on coinbase. Instead of swapping fwb to eth on Metamask first…I know I know… was 5k so not a small amount… Was told by Coinbase it’s probably just stuck on Etherium network and to call tech support at Etherium which doesn’t seem to exist…?? I’ve heard many horror stories like this but some seem to get resolved. Anyone else experience sending an erc20 coin to Etherium by accident and somehow retrieving the asset back? Any ideas?