How to get rid of "Cellular data turned off" pop-up

Hi everyone, I get this "Cellular data turned off" pop-up every time I have Wifi and data turned off and I'm trying to use an app such as Facebook Messenger or Safari, which require connection to the Internet. I'm already well aware that data is turned off, so I don't need these notifications popping up every time I'm trying to use an app.

I've scoured the Notifications settings and each app under it, and looked for apps that will turn this off. Got nothing so far. If anything could help, that'd be the best Christmas present ever lol.

Thanks in advance!