Blank Red Dot Won't go away iPhone 5
So, earlier in class today I got a call from a wrong number and now I have a blank red dot over the phone app, I googled this and this means I have a voicemail. One thing, I don't have voicemail. Since I'm only 17, I don't have people calling me (and a limited number of people who have my number) so I don't need voicemail. How do I get rid of it without setting up a voicemail or disabling this badge app notifications since I need to know when I have a missed call since it's usually from my parents.
iPhone 5, 7.04 and my carrier is Telus.
I've reset it and I've reset the network settings.
iPhone 5, iOS 7.0.4