Cell C flash messages popping up on my screen constantly nagging me!

I wish there was an option for 'zero' star. I've been spammed with these flash SMSes on Cell-C.

How they work is that they come through to my phone, bypassing the usual platforms such as SMS or WhatsApp and flashes a message right on top of my screen that I'm forced to look at. This message will notify me UNTIL i've looked at it. So if I decide to ignore it, it will keep buzzing my phone, if my ringtone is on then I'm hearing it go on and on and on until I've looked at this message!

This is such a violation of customer rights. I have every right to refuse to look at a message, or take a call. Nothing should be forced upon us most definitely not on our own personal devices!

You guys are by far the worst mobile providers I've ever seen!! These messages are literally SPAM ADs by stupid companies like playing lotto which I don't play!! I'm not subscribed to any of these, never gave my consent to these messages and you should use the normal channels such as regular messaging platforms where people are in control of what they read through and what they put in the trash!