Use the options already given to you. A mixer or coinjoin would effectively blur the trail of transactions and make it untraceable back to you. It's fairly easy to create a new wallet address, so you may consider abandoning the compromised address and moving the already moved coins into a new private one.

You should note that changing the receiving address after every transaction is a good practice to maintain your pseudo anonymity, some wallet softwares do this by default.
You may also want to consider using platforms that do not require KYC, as it puts your personal information at risk of exposure, through hacks or government request.