Hi,
It seems that something is wrong in your client copy.
Usually client copy from 001 to any newly created client won't take more than 2 to 5 hours based on the system performance but not for days.
Please go through the below SAP note and try to optimize the client copy and start again.
Note 446485 - CC-ADMIN: Special copying options
Please cross verify whether the steps you are using a correct one.
1.Create a new client in the system using SCC4
2.login to the newly created client using sap* and password as pass.
3.Start the client copy by selecting SCCL.
4.select the profile correct
5.Execute the client copy in background mode.
6.see the logs in SCC3.
I hope this information helps.
Thanks and Regards,
Vimal