I offered to pay the duty on highest invoice rate but they're not having it. They want the invoices to match and I should pay duty accordingly.
I've got the invoice from bitmain and now they won't accept those either as first one sent by email had Stamp and the recent one was just an electronic copy with no stamp.
I would suggest of having the items returned to Bitmain and just resend it to you with the correct invoices and waybills. I saw on their website that you just need to pay the shipping of the items again rather than being charged of $100 per day. You can also discuss how the shipping fees should be resolved if it was their fault.