Thanks for all the reply's, what a great forum full of helpful people. Crypto.com did complete the transaction and it is confirmed on the blockchain.  I have sent screenshots of this to coinbase and spent many hours talking to the deaf and dumb support via the live message and eventually they forward it to technical support and say they will contact me via email. I am a few days into this attempt to resolve this and am now in the waiting game for them to contact me via email or for them to do nothing and close the case as resolved again. I have sent a  smaller amount of btc from crypto.com to coinbase and I did receive it, I was hoping it would trigger the missing btc but it didn't. I does appear to me that coinbase has confiscated/stolen my btc and the only hope i have is to continue to try and convince coinbase to credit my account wit my btc. Non custodial wallet for me from now on, lesson learned.

Hi, I transferred some btc from crypro.com to coinbase.com and crypto.com completed the transaction but it did not make it into my coinbase account.  The blockchain is showing it as complete. The problem lies with coinbase, when i transferred my btc my coinbase account had been restricted, upon seeing this i promptly got it unrestricted. The btc did show in my coinbase account as pending for about 10 min but then disappeared completely from coinbase. This happened 8 weeks ago, third attempt now with support and I am still waiting for them to reply. first 2 attempts they close the case as resolved. What has coinbase done with my btc, is it lost forever?
 Thanks for any help or advice.