For security reasons, when you change certain settings on your Bitcoin.com Exchange account, it automatically freezes withdrawals for a number of hours depending on the setting that you have changed.
The setting changes that cause frozen withdrawals:
Change of password (72 hours)
Modifying address whitelisting settings (48 hours)
If you have not changed any of the settings above, please contact support via the chat box on the bottom right corner and let us know your email address. Alternatively, you can email firstname.lastname@example.org.