Don’t take MTN contract phones

I’m so angry!!! I took out an mtn contract phone it comes with a simcard that I’m paying for data and airtime monthly the simcard is not registered it’s saying your number is barred contact mtn when I do that they keep saying I takes 24 hours to rica the simcard It’s 24 hours I’m angry!! Imagine if I’m having these issues now I’ve got 2freaken years to go I’m angry!!!! I cant Even return it now