If you no longer have access to the 2FA device linked to your BitMEX account please contact support to have 2FA removed from your account. 


https://www.bitmex.com/app/support/contact


Note: For security reasons, before we can remove 2FA from your account you will need to undergo ID verification to prove that you are the owner of the account. 


You can learn more about the ID verification process here: https://bitmex.freshdesk.com/en/support/solutions/articles/13000055145-id-verification-help-sheet