how to prevent mac?

hello all
i have a user with mac address who trying to make truble
he try to log in to my hotspot many times repeatedly and trying names and password , i have his mac so what i can do to stop such like users(mac’s)

This is the way, replace interface name and MAC address.

/interface wireless access-list
add authentication=no comment="m*therfu*ker" forwarding=no interface=wlan1 mac-address=70:11:24:66:66:66

If I helped you, please add Karma.