Since yesterday I have been receiving calls from '54904' I know it is all these advert shortcodes so I don't bother picking. However, unlike other shortcodes that call once or twice and gives it a break, this one calls incessantly. Today alone, it has called me 12times already! If not for my call blocking app that helps me reject the call automatically, I would have gone nuts by now. I use an MTN line. Please any way around this?