transactions – Sent BCH to BTC and need to retrieve!

New user here. I have accidently sent my BCH to BTC and would like to understand the process on to retrieve the funds and placed back into my Coinbase wallet. I have read through multiple other sites and some users say it is possible. I’ve found my “BLOCK” number and Transaction number on, so Im assuming this shows me where the funds went? this is as far as I have gotten. Does anyone know a step by step way of retrieving? Any help would be greatly appreciated!! Thank you all in advance for your attention.