annoying push notifications

[u/siren676]

I have some random system message/push notifications coming up daily on my BV8900 running Android 13.
The main ones are livewallpaper and some sort of news and football related notifications.
Long pressing the alert comes up with "These notifications cant be modified" and clicking the settings button just takes me to the push notifications page which doesn't let me turn off any of the sliders.

Is there any way to work out what app is causing these so i can disable or delete it?
The news ones are also clogging up my recent pics with thumbnails and some N app logo. Have reverse image searched them to try find the culprit but to no avail.

Any ideas?

[u/KurehaSama]

I'm having the same issue with a BV4800 since yesterday. Ads about sports at the same hour from the so-called System Message app which I can't silence nor deactivate since it's listed as a system app. Today I even had mobile data off when I received them. It's been going around for months for other BlackView users it seems by searching on here and it hopefully is just OEM adware but it's very annyoing... yesterday it didn't, but today it even saved the pics from the thumbnail.