Yes, I'm a batch 1 B3 owner. Had the same email this morning and I can confirm I have now received the partial refund to the BCH address I gave them.
You could try entering the BCH address you gave them
here to see if the transaction is recorded on the blockchain.
i'm fallowing this thread but not b3 owner...can you elaborate more..
so..batch 1 owner paid 2.6k usd (right)? and get about 530 usd partial refund