This question already has an answer here:
A friend asked for my Bitcoin Cash address to send some BCH, but after giving her my Bittrex Bitcoin Cash wallet address she instead accidentally sent Bitcoin and not Bitcoin Cash from her Blockchain.com wallet. Of course the transaction has not shown up and she is now missing her Bitcoin. She and I have both emailed Blockchain.com Support and they have been unresponsive in helping to recover her missing Bitcoin so it can be sent to the proper address. Any help anyone may have is Greatly needed and Appreciated!! These mistakes can be very costly as Im sure, whoever may be reading this, already knows!! Thank you Anyone and Everyone for your time and support with help on this issue!! Again, The Bitcoin was sent from Blockchain.com's wallet to a Bitcoin Cash wallet on the Bittrex exchange..... I have reached out to Bittrex customer support as well but still awaiting a reply! If recovered before someone has a chance to offer help, I will update this post with how it was done, but any and all help is GREATLY Appreciated!!