systemctl-mask

Mask a service (prevent it from being started)

$ systemctl mask [service_name]

$ systemctl mask [service_name] --now

$ systemctl mask [service_name] --user

systemctl [OPTIONS...] mask UNIT...

systemctl mask links a unit to /dev/null, completely preventing it from being started by any means. This is stronger than disable, which only prevents automatic startup. Masked units cannot be started manually, by dependencies, or by any trigger.
Masking is useful for units that conflict with your setup or that you want to ensure never run. Use systemctl unmask to reverse the operation.

--now

Also stop the unit after masking

Mask user service manager units instead of system units

Mask temporarily until next reboot only

Requires root privileges for system units. Masked units are impossible to start until unmasked. Use carefully; masking essential units can break system functionality. Check for dependencies before masking to avoid breaking other services.

systemctl(1), systemctl-unmask(1), systemctl-disable(1)