BTC to BCH from coinbase to bitmain. PLEASE HELP

[bitman1973]

on October 1st, 2017 I send −0.63566399 BTC to BCC(bitcoin cash) address(−0.63566399 BTC≈ $2,740.93 from my account(coinbase) to bitmain. Bitmain ONLY accepts BCH.  Looking at the BTC blockchain, The Bitmain has not collected these funds, as it is on the BTC blockchain and not the BCC blockchain. The merchant is not responding to me when i call or email them. But as I look at the details on BTC blockchain it looks like its just sitting there.(unspent)

I have called both bitmain and coinbase with no reponse. I am willing to give anyone with the technical skills,  20% of what the coin is worth today or best offer. Can anyone help me please?

[HeRetiK]

Coinbase won't be able to help you, since once the coins leave Coinbase's wallet they are out of their control. At this point the only ones that can help you recover your coins is Bitmain. Maybe try reaching out to them on Twitter if the regular support channels don't work.