i read somewhere that you can report any spam sms, whatsapp, wechat or whatever to SKMM/MCMC. just screenshot the spam and phone number and whatsapp the pictures to SKMM/MCMC phone number.
i don’t know if they really do their job but hey it’s worth trying lor.
got flooded with spam? report them to SKMM/MCMC at +6016-220 6262