CoinSwitch is one of the platform where you can convert any cryptocurrency to cryptocurrency, And it provides credit card facilities for transaction. They also provides best alternative prices.
You can now convert your coins from BCH to BCHABC
It is the world’s largest cryptocurrency exchange aggregator which supports 300+ coins and over 45,000+ pairs. It provides an easier way of trading through the global exchanges like KuCoin, IDEX, Changelly, Bittrex, Cryptopia, ChangeNow and Changer without creating an account on them. If you are interested in buying cryptos, do give it a try!.