coinbase, where is my btc and will i get bch
There was an announcement sent out by Coinbase on the 27th explaining that they would not be honoring BCH. Coinbase effectively swallowed your attached BCH but should honor your BTC. 
Your transaction cannot be cancelled just because the chain hasn't finished verifying it. Additionally, because of the replay security in the BCH blockchain your transfer already happened and the BCH will be created for the account that the BTC was transferred to, namely Coinbase's account, which again does not recognize BCH.