MTN ZTE Router the worst

I am so disappointed with mtn I opened contract with Mtn for uncapped wifi but their router ZTE doesn't work at all what frustrate me is when I call call center they say ohhh that router is a problem why sell it if you know it's got so much complain and to make it worse when I asked to cancel contract they want to charge me r2000 no one I helping me concerning this so frustrated run away from MTN